Home / 818,129.30-1,129,117.46-469,397.39

Finding the Fourth Proportional to 818,129.30, 1,129,117.46 and 469,397.39

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Solution

The fourth proportional to 818,129.30, 1,129,117.46 and 469,397.39 is: 647,825.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,129.30 : 1,129,117.46 = 469,397.39 : x
  2. Step 2: Convert to fraction form
    818,129.30/1,129,117.46 = 469,397.39/x
  3. Step 3: Cross multiply
    818,129.30x = 1,129,117.46 × 469,397.39
  4. Step 4: Simplify right side
    818,129.30x = 530,004,780,734.86
  5. Step 5: Solve for x
    x = 530,004,780,734.86/818,129.30
  6. Step 6: Final answer
    x = 647,825.21

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.