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Finding the Fourth Proportional to 898.61, 1,347.30 and 487.35

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Solution

The fourth proportional to 898.61, 1,347.30 and 487.35 is: 730.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.61 : 1,347.30 = 487.35 : x
  2. Step 2: Convert to fraction form
    898.61/1,347.30 = 487.35/x
  3. Step 3: Cross multiply
    898.61x = 1,347.30 × 487.35
  4. Step 4: Simplify right side
    898.61x = 656,606.66
  5. Step 5: Solve for x
    x = 656,606.66/898.61
  6. Step 6: Final answer
    x = 730.70

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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.