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Finding the Fourth Proportional to 898.14, 1,347.45 and 321.06

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Solution

The fourth proportional to 898.14, 1,347.45 and 321.06 is: 481.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.14 : 1,347.45 = 321.06 : x
  2. Step 2: Convert to fraction form
    898.14/1,347.45 = 321.06/x
  3. Step 3: Cross multiply
    898.14x = 1,347.45 × 321.06
  4. Step 4: Simplify right side
    898.14x = 432,612.30
  5. Step 5: Solve for x
    x = 432,612.30/898.14
  6. Step 6: Final answer
    x = 481.68

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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.