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Finding the Fourth Proportional to 555.91, 766.53 and 406.27

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Solution

The fourth proportional to 555.91, 766.53 and 406.27 is: 560.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.91 : 766.53 = 406.27 : x
  2. Step 2: Convert to fraction form
    555.91/766.53 = 406.27/x
  3. Step 3: Cross multiply
    555.91x = 766.53 × 406.27
  4. Step 4: Simplify right side
    555.91x = 311,418.14
  5. Step 5: Solve for x
    x = 311,418.14/555.91
  6. Step 6: Final answer
    x = 560.20

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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.