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Finding the Fourth Proportional to 258,006.60, 387,009.90 and 156,967.20

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Solution

The fourth proportional to 258,006.60, 387,009.90 and 156,967.20 is: 235,450.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,006.60 : 387,009.90 = 156,967.20 : x
  2. Step 2: Convert to fraction form
    258,006.60/387,009.90 = 156,967.20/x
  3. Step 3: Cross multiply
    258,006.60x = 387,009.90 × 156,967.20
  4. Step 4: Simplify right side
    258,006.60x = 60,747,860,375.28
  5. Step 5: Solve for x
    x = 60,747,860,375.28/258,006.60
  6. Step 6: Final answer
    x = 235,450.80

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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.