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Finding the Fourth Proportional to 502.67, 754.44 and 420.91

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Solution

The fourth proportional to 502.67, 754.44 and 420.91 is: 631.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.67 : 754.44 = 420.91 : x
  2. Step 2: Convert to fraction form
    502.67/754.44 = 420.91/x
  3. Step 3: Cross multiply
    502.67x = 754.44 × 420.91
  4. Step 4: Simplify right side
    502.67x = 317,547.57
  5. Step 5: Solve for x
    x = 317,547.57/502.67
  6. Step 6: Final answer
    x = 631.73

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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.