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Finding the Fourth Proportional to 501.59, 753.17 and 420.09

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Solution

The fourth proportional to 501.59, 753.17 and 420.09 is: 630.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.59 : 753.17 = 420.09 : x
  2. Step 2: Convert to fraction form
    501.59/753.17 = 420.09/x
  3. Step 3: Cross multiply
    501.59x = 753.17 × 420.09
  4. Step 4: Simplify right side
    501.59x = 316,394.26
  5. Step 5: Solve for x
    x = 316,394.26/501.59
  6. Step 6: Final answer
    x = 630.78

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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.