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Finding the Fourth Proportional to 423,434.61, 634,668.72 and 170,553.15

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Solution

The fourth proportional to 423,434.61, 634,668.72 and 170,553.15 is: 255,635.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,434.61 : 634,668.72 = 170,553.15 : x
  2. Step 2: Convert to fraction form
    423,434.61/634,668.72 = 170,553.15/x
  3. Step 3: Cross multiply
    423,434.61x = 634,668.72 × 170,553.15
  4. Step 4: Simplify right side
    423,434.61x = 108,244,749,402.47
  5. Step 5: Solve for x
    x = 108,244,749,402.47/423,434.61
  6. Step 6: Final answer
    x = 255,635.10

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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.