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Finding the Fourth Proportional to 551,107.80, 826,661.70 and 409,390.20

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Solution

The fourth proportional to 551,107.80, 826,661.70 and 409,390.20 is: 614,085.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,107.80 : 826,661.70 = 409,390.20 : x
  2. Step 2: Convert to fraction form
    551,107.80/826,661.70 = 409,390.20/x
  3. Step 3: Cross multiply
    551,107.80x = 826,661.70 × 409,390.20
  4. Step 4: Simplify right side
    551,107.80x = 338,427,198,695.34
  5. Step 5: Solve for x
    x = 338,427,198,695.34/551,107.80
  6. Step 6: Final answer
    x = 614,085.30

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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.