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Finding the Fourth Proportional to 750.93, 1,126.21 and 385.53

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Solution

The fourth proportional to 750.93, 1,126.21 and 385.53 is: 578.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.93 : 1,126.21 = 385.53 : x
  2. Step 2: Convert to fraction form
    750.93/1,126.21 = 385.53/x
  3. Step 3: Cross multiply
    750.93x = 1,126.21 × 385.53
  4. Step 4: Simplify right side
    750.93x = 434,187.74
  5. Step 5: Solve for x
    x = 434,187.74/750.93
  6. Step 6: Final answer
    x = 578.20

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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.