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Finding the Fourth Proportional to 487,907.60, 731,861.40 and 172,396.40

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Solution

The fourth proportional to 487,907.60, 731,861.40 and 172,396.40 is: 258,594.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,907.60 : 731,861.40 = 172,396.40 : x
  2. Step 2: Convert to fraction form
    487,907.60/731,861.40 = 172,396.40/x
  3. Step 3: Cross multiply
    487,907.60x = 731,861.40 × 172,396.40
  4. Step 4: Simplify right side
    487,907.60x = 126,170,270,658.96
  5. Step 5: Solve for x
    x = 126,170,270,658.96/487,907.60
  6. Step 6: Final answer
    x = 258,594.60

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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.