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Finding the Fourth Proportional to 898.63, 1,347.61 and 411.34

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Solution

The fourth proportional to 898.63, 1,347.61 and 411.34 is: 616.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.63 : 1,347.61 = 411.34 : x
  2. Step 2: Convert to fraction form
    898.63/1,347.61 = 411.34/x
  3. Step 3: Cross multiply
    898.63x = 1,347.61 × 411.34
  4. Step 4: Simplify right side
    898.63x = 554,325.90
  5. Step 5: Solve for x
    x = 554,325.90/898.63
  6. Step 6: Final answer
    x = 616.86

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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.