Home / 721,887,428.52-996,205,914.18-391,862,791.08

Finding the Fourth Proportional to 721,887,428.52, 996,205,914.18 and 391,862,791.08

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Solution

The fourth proportional to 721,887,428.52, 996,205,914.18 and 391,862,791.08 is: 540,771,337.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,887,428.52 : 996,205,914.18 = 391,862,791.08 : x
  2. Step 2: Convert to fraction form
    721,887,428.52/996,205,914.18 = 391,862,791.08/x
  3. Step 3: Cross multiply
    721,887,428.52x = 996,205,914.18 × 391,862,791.08
  4. Step 4: Simplify right side
    721,887,428.52x = 390,376,030,020,977,728
  5. Step 5: Solve for x
    x = 390,376,030,020,977,728/721,887,428.52
  6. Step 6: Final answer
    x = 540,771,337.19

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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.