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Finding the Fourth Proportional to 750.12, 1,124.28 and 634.20

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Solution

The fourth proportional to 750.12, 1,124.28 and 634.20 is: 950.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.12 : 1,124.28 = 634.20 : x
  2. Step 2: Convert to fraction form
    750.12/1,124.28 = 634.20/x
  3. Step 3: Cross multiply
    750.12x = 1,124.28 × 634.20
  4. Step 4: Simplify right side
    750.12x = 713,018.38
  5. Step 5: Solve for x
    x = 713,018.38/750.12
  6. Step 6: Final answer
    x = 950.54

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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.