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Finding the Fourth Proportional to 501.86, 751.76 and 487.28

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Solution

The fourth proportional to 501.86, 751.76 and 487.28 is: 729.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.86 : 751.76 = 487.28 : x
  2. Step 2: Convert to fraction form
    501.86/751.76 = 487.28/x
  3. Step 3: Cross multiply
    501.86x = 751.76 × 487.28
  4. Step 4: Simplify right side
    501.86x = 366,317.61
  5. Step 5: Solve for x
    x = 366,317.61/501.86
  6. Step 6: Final answer
    x = 729.92

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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.