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Finding the Fourth Proportional to 638,612,002.80, 956,126,413.80 and 620,696,098.80

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Solution

The fourth proportional to 638,612,002.80, 956,126,413.80 and 620,696,098.80 is: 929,302,819.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,612,002.80 : 956,126,413.80 = 620,696,098.80 : x
  2. Step 2: Convert to fraction form
    638,612,002.80/956,126,413.80 = 620,696,098.80/x
  3. Step 3: Cross multiply
    638,612,002.80x = 956,126,413.80 × 620,696,098.80
  4. Step 4: Simplify right side
    638,612,002.80x = 593,463,935,005,294,464
  5. Step 5: Solve for x
    x = 593,463,935,005,294,464/638,612,002.80
  6. Step 6: Final answer
    x = 929,302,819.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.