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Finding the Fourth Proportional to 721,946.88, 996,446.88 and 420,315.84

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Solution

The fourth proportional to 721,946.88, 996,446.88 and 420,315.84 is: 580,129.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,946.88 : 996,446.88 = 420,315.84 : x
  2. Step 2: Convert to fraction form
    721,946.88/996,446.88 = 420,315.84/x
  3. Step 3: Cross multiply
    721,946.88x = 996,446.88 × 420,315.84
  4. Step 4: Simplify right side
    721,946.88x = 418,822,407,382.58
  5. Step 5: Solve for x
    x = 418,822,407,382.58/721,946.88
  6. Step 6: Final answer
    x = 580,129.12

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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.