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Finding the Fourth Proportional to 518.52, 781.53 and 487.08

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Solution

The fourth proportional to 518.52, 781.53 and 487.08 is: 734.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.52 : 781.53 = 487.08 : x
  2. Step 2: Convert to fraction form
    518.52/781.53 = 487.08/x
  3. Step 3: Cross multiply
    518.52x = 781.53 × 487.08
  4. Step 4: Simplify right side
    518.52x = 380,667.63
  5. Step 5: Solve for x
    x = 380,667.63/518.52
  6. Step 6: Final answer
    x = 734.14

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.