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Finding the Fourth Proportional to 750.62, 1,125.74 and 385.11

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Solution

The fourth proportional to 750.62, 1,125.74 and 385.11 is: 577.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.62 : 1,125.74 = 385.11 : x
  2. Step 2: Convert to fraction form
    750.62/1,125.74 = 385.11/x
  3. Step 3: Cross multiply
    750.62x = 1,125.74 × 385.11
  4. Step 4: Simplify right side
    750.62x = 433,531.81
  5. Step 5: Solve for x
    x = 433,531.81/750.62
  6. Step 6: Final answer
    x = 577.57

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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.