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Finding the Fourth Proportional to 1,125.65, 1,553.33 and 752.57

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Solution

The fourth proportional to 1,125.65, 1,553.33 and 752.57 is: 1,038.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.65 : 1,553.33 = 752.57 : x
  2. Step 2: Convert to fraction form
    1,125.65/1,553.33 = 752.57/x
  3. Step 3: Cross multiply
    1,125.65x = 1,553.33 × 752.57
  4. Step 4: Simplify right side
    1,125.65x = 1,168,980.90
  5. Step 5: Solve for x
    x = 1,168,980.90/1,125.65
  6. Step 6: Final answer
    x = 1,038.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.