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Finding the Fourth Proportional to 529.92, 729.60 and 501.12

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Solution

The fourth proportional to 529.92, 729.60 and 501.12 is: 689.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.92 : 729.60 = 501.12 : x
  2. Step 2: Convert to fraction form
    529.92/729.60 = 501.12/x
  3. Step 3: Cross multiply
    529.92x = 729.60 × 501.12
  4. Step 4: Simplify right side
    529.92x = 365,617.15
  5. Step 5: Solve for x
    x = 365,617.15/529.92
  6. Step 6: Final answer
    x = 689.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.