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Finding the Fourth Proportional to 406,500.40, 609,815.40 and 169,721.20

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Solution

The fourth proportional to 406,500.40, 609,815.40 and 169,721.20 is: 254,608.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,500.40 : 609,815.40 = 169,721.20 : x
  2. Step 2: Convert to fraction form
    406,500.40/609,815.40 = 169,721.20/x
  3. Step 3: Cross multiply
    406,500.40x = 609,815.40 × 169,721.20
  4. Step 4: Simplify right side
    406,500.40x = 103,498,601,466.48
  5. Step 5: Solve for x
    x = 103,498,601,466.48/406,500.40
  6. Step 6: Final answer
    x = 254,608.86

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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.