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Finding the Fourth Proportional to 1,385.03, 2,077.52 and 411.14

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Solution

The fourth proportional to 1,385.03, 2,077.52 and 411.14 is: 616.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.03 : 2,077.52 = 411.14 : x
  2. Step 2: Convert to fraction form
    1,385.03/2,077.52 = 411.14/x
  3. Step 3: Cross multiply
    1,385.03x = 2,077.52 × 411.14
  4. Step 4: Simplify right side
    1,385.03x = 854,154.71
  5. Step 5: Solve for x
    x = 854,154.71/1,385.03
  6. Step 6: Final answer
    x = 616.70

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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.