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Finding the Fourth Proportional to 665.57, 916.56 and 540.83

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Solution

The fourth proportional to 665.57, 916.56 and 540.83 is: 744.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.57 : 916.56 = 540.83 : x
  2. Step 2: Convert to fraction form
    665.57/916.56 = 540.83/x
  3. Step 3: Cross multiply
    665.57x = 916.56 × 540.83
  4. Step 4: Simplify right side
    665.57x = 495,698.56
  5. Step 5: Solve for x
    x = 495,698.56/665.57
  6. Step 6: Final answer
    x = 744.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.