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Finding the Fourth Proportional to 1,385.52, 2,077.54 and 411.48

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Solution

The fourth proportional to 1,385.52, 2,077.54 and 411.48 is: 617.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.52 : 2,077.54 = 411.48 : x
  2. Step 2: Convert to fraction form
    1,385.52/2,077.54 = 411.48/x
  3. Step 3: Cross multiply
    1,385.52x = 2,077.54 × 411.48
  4. Step 4: Simplify right side
    1,385.52x = 854,866.16
  5. Step 5: Solve for x
    x = 854,866.16/1,385.52
  6. Step 6: Final answer
    x = 617.00

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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.