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Finding the Fourth Proportional to 1,044.90, 1,564.08 and 557.28

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Solution

The fourth proportional to 1,044.90, 1,564.08 and 557.28 is: 834.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,044.90 : 1,564.08 = 557.28 : x
  2. Step 2: Convert to fraction form
    1,044.90/1,564.08 = 557.28/x
  3. Step 3: Cross multiply
    1,044.90x = 1,564.08 × 557.28
  4. Step 4: Simplify right side
    1,044.90x = 871,630.50
  5. Step 5: Solve for x
    x = 871,630.50/1,044.90
  6. Step 6: Final answer
    x = 834.18

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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.