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Finding the Fourth Proportional to 898.60, 1,347.10 and 321.34

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Solution

The fourth proportional to 898.60, 1,347.10 and 321.34 is: 481.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.60 : 1,347.10 = 321.34 : x
  2. Step 2: Convert to fraction form
    898.60/1,347.10 = 321.34/x
  3. Step 3: Cross multiply
    898.60x = 1,347.10 × 321.34
  4. Step 4: Simplify right side
    898.60x = 432,877.11
  5. Step 5: Solve for x
    x = 432,877.11/898.60
  6. Step 6: Final answer
    x = 481.72

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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.