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Finding the Fourth Proportional to 479,413.84, 718,897.20 and 142,330.72

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Solution

The fourth proportional to 479,413.84, 718,897.20 and 142,330.72 is: 213,429.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,413.84 : 718,897.20 = 142,330.72 : x
  2. Step 2: Convert to fraction form
    479,413.84/718,897.20 = 142,330.72/x
  3. Step 3: Cross multiply
    479,413.84x = 718,897.20 × 142,330.72
  4. Step 4: Simplify right side
    479,413.84x = 102,321,156,081.98
  5. Step 5: Solve for x
    x = 102,321,156,081.98/479,413.84
  6. Step 6: Final answer
    x = 213,429.71

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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.