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Finding the Fourth Proportional to 658,272.06, 987,400.80 and 208,980.86

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Solution

The fourth proportional to 658,272.06, 987,400.80 and 208,980.86 is: 313,468.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,272.06 : 987,400.80 = 208,980.86 : x
  2. Step 2: Convert to fraction form
    658,272.06/987,400.80 = 208,980.86/x
  3. Step 3: Cross multiply
    658,272.06x = 987,400.80 × 208,980.86
  4. Step 4: Simplify right side
    658,272.06x = 206,347,863,411.68
  5. Step 5: Solve for x
    x = 206,347,863,411.68/658,272.06
  6. Step 6: Final answer
    x = 313,468.97

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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.