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Finding the Fourth Proportional to 422,572.40, 634,514.70 and 245,425.40

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Solution

The fourth proportional to 422,572.40, 634,514.70 and 245,425.40 is: 368,519.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,572.40 : 634,514.70 = 245,425.40 : x
  2. Step 2: Convert to fraction form
    422,572.40/634,514.70 = 245,425.40/x
  3. Step 3: Cross multiply
    422,572.40x = 634,514.70 × 245,425.40
  4. Step 4: Simplify right side
    422,572.40x = 155,726,024,053.38
  5. Step 5: Solve for x
    x = 155,726,024,053.38/422,572.40
  6. Step 6: Final answer
    x = 368,519.16

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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.