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Finding the Fourth Proportional to 750.44, 1,124.21 and 646.70

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Solution

The fourth proportional to 750.44, 1,124.21 and 646.70 is: 968.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.44 : 1,124.21 = 646.70 : x
  2. Step 2: Convert to fraction form
    750.44/1,124.21 = 646.70/x
  3. Step 3: Cross multiply
    750.44x = 1,124.21 × 646.70
  4. Step 4: Simplify right side
    750.44x = 727,026.61
  5. Step 5: Solve for x
    x = 727,026.61/750.44
  6. Step 6: Final answer
    x = 968.80

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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.