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Finding the Fourth Proportional to 750.10, 1,125.15 and 682.90

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Solution

The fourth proportional to 750.10, 1,125.15 and 682.90 is: 1,024.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.10 : 1,125.15 = 682.90 : x
  2. Step 2: Convert to fraction form
    750.10/1,125.15 = 682.90/x
  3. Step 3: Cross multiply
    750.10x = 1,125.15 × 682.90
  4. Step 4: Simplify right side
    750.10x = 768,364.94
  5. Step 5: Solve for x
    x = 768,364.94/750.10
  6. Step 6: Final answer
    x = 1,024.35

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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.