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Finding the Fourth Proportional to 491, 734.61 and 487.49

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Solution

The fourth proportional to 491, 734.61 and 487.49 is: 729.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    491 : 734.61 = 487.49 : x
  2. Step 2: Convert to fraction form
    491/734.61 = 487.49/x
  3. Step 3: Cross multiply
    491x = 734.61 × 487.49
  4. Step 4: Simplify right side
    491x = 358,115.03
  5. Step 5: Solve for x
    x = 358,115.03/491
  6. Step 6: Final answer
    x = 729.36

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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.