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Finding the Fourth Proportional to 1,104.71, 1,665.09 and 1,045.17

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Solution

The fourth proportional to 1,104.71, 1,665.09 and 1,045.17 is: 1,575.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,104.71 : 1,665.09 = 1,045.17 : x
  2. Step 2: Convert to fraction form
    1,104.71/1,665.09 = 1,045.17/x
  3. Step 3: Cross multiply
    1,104.71x = 1,665.09 × 1,045.17
  4. Step 4: Simplify right side
    1,104.71x = 1,740,302.12
  5. Step 5: Solve for x
    x = 1,740,302.12/1,104.71
  6. Step 6: Final answer
    x = 1,575.35

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.