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Finding the Fourth Proportional to 406,372.80, 609,632.10 and 169,739.40

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Solution

The fourth proportional to 406,372.80, 609,632.10 and 169,739.40 is: 254,639.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,372.80 : 609,632.10 = 169,739.40 : x
  2. Step 2: Convert to fraction form
    406,372.80/609,632.10 = 169,739.40/x
  3. Step 3: Cross multiply
    406,372.80x = 609,632.10 × 169,739.40
  4. Step 4: Simplify right side
    406,372.80x = 103,478,586,874.74
  5. Step 5: Solve for x
    x = 103,478,586,874.74/406,372.80
  6. Step 6: Final answer
    x = 254,639.55

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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.