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Finding the Fourth Proportional to 750.50, 1,124.04 and 613.34

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Solution

The fourth proportional to 750.50, 1,124.04 and 613.34 is: 918.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.50 : 1,124.04 = 613.34 : x
  2. Step 2: Convert to fraction form
    750.50/1,124.04 = 613.34/x
  3. Step 3: Cross multiply
    750.50x = 1,124.04 × 613.34
  4. Step 4: Simplify right side
    750.50x = 689,418.69
  5. Step 5: Solve for x
    x = 689,418.69/750.50
  6. Step 6: Final answer
    x = 918.61

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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.