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Finding the Fourth Proportional to 740.59, 1,110.29 and 508.79

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Solution

The fourth proportional to 740.59, 1,110.29 and 508.79 is: 762.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.59 : 1,110.29 = 508.79 : x
  2. Step 2: Convert to fraction form
    740.59/1,110.29 = 508.79/x
  3. Step 3: Cross multiply
    740.59x = 1,110.29 × 508.79
  4. Step 4: Simplify right side
    740.59x = 564,904.45
  5. Step 5: Solve for x
    x = 564,904.45/740.59
  6. Step 6: Final answer
    x = 762.78

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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.