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Finding the Fourth Proportional to 415,356.80, 623,326.80 and 178,869.20

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Solution

The fourth proportional to 415,356.80, 623,326.80 and 178,869.20 is: 268,429.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,356.80 : 623,326.80 = 178,869.20 : x
  2. Step 2: Convert to fraction form
    415,356.80/623,326.80 = 178,869.20/x
  3. Step 3: Cross multiply
    415,356.80x = 623,326.80 × 178,869.20
  4. Step 4: Simplify right side
    415,356.80x = 111,493,966,054.56
  5. Step 5: Solve for x
    x = 111,493,966,054.56/415,356.80
  6. Step 6: Final answer
    x = 268,429.37

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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.