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Finding the Fourth Proportional to 721,956.20, 996,561.99 and 420,150.20

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Solution

The fourth proportional to 721,956.20, 996,561.99 and 420,150.20 is: 579,960.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,956.20 : 996,561.99 = 420,150.20 : x
  2. Step 2: Convert to fraction form
    721,956.20/996,561.99 = 420,150.20/x
  3. Step 3: Cross multiply
    721,956.20x = 996,561.99 × 420,150.20
  4. Step 4: Simplify right side
    721,956.20x = 418,705,714,428.09
  5. Step 5: Solve for x
    x = 418,705,714,428.09/721,956.20
  6. Step 6: Final answer
    x = 579,960.00

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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.