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Finding the Fourth Proportional to 1,148.61, 1,722.92 and 417.90

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Solution

The fourth proportional to 1,148.61, 1,722.92 and 417.90 is: 626.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.61 : 1,722.92 = 417.90 : x
  2. Step 2: Convert to fraction form
    1,148.61/1,722.92 = 417.90/x
  3. Step 3: Cross multiply
    1,148.61x = 1,722.92 × 417.90
  4. Step 4: Simplify right side
    1,148.61x = 720,008.27
  5. Step 5: Solve for x
    x = 720,008.27/1,148.61
  6. Step 6: Final answer
    x = 626.85

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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.