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Finding the Fourth Proportional to 887,205.90, 1,330,808.85 and 256,140.30

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Solution

The fourth proportional to 887,205.90, 1,330,808.85 and 256,140.30 is: 384,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,205.90 : 1,330,808.85 = 256,140.30 : x
  2. Step 2: Convert to fraction form
    887,205.90/1,330,808.85 = 256,140.30/x
  3. Step 3: Cross multiply
    887,205.90x = 1,330,808.85 × 256,140.30
  4. Step 4: Simplify right side
    887,205.90x = 340,873,778,081.66
  5. Step 5: Solve for x
    x = 340,873,778,081.66/887,205.90
  6. Step 6: Final answer
    x = 384,210.45

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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.