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Finding the Fourth Proportional to 875,105.70, 1,312,658.55 and 800,310.30

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Solution

The fourth proportional to 875,105.70, 1,312,658.55 and 800,310.30 is: 1,200,465.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,105.70 : 1,312,658.55 = 800,310.30 : x
  2. Step 2: Convert to fraction form
    875,105.70/1,312,658.55 = 800,310.30/x
  3. Step 3: Cross multiply
    875,105.70x = 1,312,658.55 × 800,310.30
  4. Step 4: Simplify right side
    875,105.70x = 1,050,534,157,948.07
  5. Step 5: Solve for x
    x = 1,050,534,157,948.07/875,105.70
  6. Step 6: Final answer
    x = 1,200,465.45

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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.