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Finding the Fourth Proportional to 407,814.60, 611,721.90 and 112,326.60

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Solution

The fourth proportional to 407,814.60, 611,721.90 and 112,326.60 is: 168,489.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,814.60 : 611,721.90 = 112,326.60 : x
  2. Step 2: Convert to fraction form
    407,814.60/611,721.90 = 112,326.60/x
  3. Step 3: Cross multiply
    407,814.60x = 611,721.90 × 112,326.60
  4. Step 4: Simplify right side
    407,814.60x = 68,712,641,172.54
  5. Step 5: Solve for x
    x = 68,712,641,172.54/407,814.60
  6. Step 6: Final answer
    x = 168,489.90

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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.