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Finding the Fourth Proportional to 750.24, 1,123.78 and 489.08

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Solution

The fourth proportional to 750.24, 1,123.78 and 489.08 is: 732.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.24 : 1,123.78 = 489.08 : x
  2. Step 2: Convert to fraction form
    750.24/1,123.78 = 489.08/x
  3. Step 3: Cross multiply
    750.24x = 1,123.78 × 489.08
  4. Step 4: Simplify right side
    750.24x = 549,623.85
  5. Step 5: Solve for x
    x = 549,623.85/750.24
  6. Step 6: Final answer
    x = 732.60

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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.