Home / 1,129,902.78-1,694,854.17-420,109.50

Finding the Fourth Proportional to 1,129,902.78, 1,694,854.17 and 420,109.50

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Solution

The fourth proportional to 1,129,902.78, 1,694,854.17 and 420,109.50 is: 630,164.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129,902.78 : 1,694,854.17 = 420,109.50 : x
  2. Step 2: Convert to fraction form
    1,129,902.78/1,694,854.17 = 420,109.50/x
  3. Step 3: Cross multiply
    1,129,902.78x = 1,694,854.17 × 420,109.50
  4. Step 4: Simplify right side
    1,129,902.78x = 712,024,337,931.62
  5. Step 5: Solve for x
    x = 712,024,337,931.62/1,129,902.78
  6. Step 6: Final answer
    x = 630,164.25

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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.