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Finding the Fourth Proportional to 1,103.77, 1,655.70 and 410.61

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Solution

The fourth proportional to 1,103.77, 1,655.70 and 410.61 is: 615.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,103.77 : 1,655.70 = 410.61 : x
  2. Step 2: Convert to fraction form
    1,103.77/1,655.70 = 410.61/x
  3. Step 3: Cross multiply
    1,103.77x = 1,655.70 × 410.61
  4. Step 4: Simplify right side
    1,103.77x = 679,846.98
  5. Step 5: Solve for x
    x = 679,846.98/1,103.77
  6. Step 6: Final answer
    x = 615.93

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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.