Home / 783,394,699.92-1,082,635,805.68-642,042,972.47

Finding the Fourth Proportional to 783,394,699.92, 1,082,635,805.68 and 642,042,972.47

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Solution

The fourth proportional to 783,394,699.92, 1,082,635,805.68 and 642,042,972.47 is: 887,290,545.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,394,699.92 : 1,082,635,805.68 = 642,042,972.47 : x
  2. Step 2: Convert to fraction form
    783,394,699.92/1,082,635,805.68 = 642,042,972.47/x
  3. Step 3: Cross multiply
    783,394,699.92x = 1,082,635,805.68 × 642,042,972.47
  4. Step 4: Simplify right side
    783,394,699.92x = 695,098,710,776,246,656
  5. Step 5: Solve for x
    x = 695,098,710,776,246,656/783,394,699.92
  6. Step 6: Final answer
    x = 887,290,545.68

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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.