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Finding the Fourth Proportional to 750.88, 1,125.60 and 318.24

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Solution

The fourth proportional to 750.88, 1,125.60 and 318.24 is: 477.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.88 : 1,125.60 = 318.24 : x
  2. Step 2: Convert to fraction form
    750.88/1,125.60 = 318.24/x
  3. Step 3: Cross multiply
    750.88x = 1,125.60 × 318.24
  4. Step 4: Simplify right side
    750.88x = 358,210.94
  5. Step 5: Solve for x
    x = 358,210.94/750.88
  6. Step 6: Final answer
    x = 477.05

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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.