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Finding the Fourth Proportional to 853,703.40, 1,280,555.10 and 814,337.40

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Solution

The fourth proportional to 853,703.40, 1,280,555.10 and 814,337.40 is: 1,221,506.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,703.40 : 1,280,555.10 = 814,337.40 : x
  2. Step 2: Convert to fraction form
    853,703.40/1,280,555.10 = 814,337.40/x
  3. Step 3: Cross multiply
    853,703.40x = 1,280,555.10 × 814,337.40
  4. Step 4: Simplify right side
    853,703.40x = 1,042,803,910,690.74
  5. Step 5: Solve for x
    x = 1,042,803,910,690.74/853,703.40
  6. Step 6: Final answer
    x = 1,221,506.10

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.