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Finding the Fourth Proportional to 555.57, 766.65 and 322.71

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Solution

The fourth proportional to 555.57, 766.65 and 322.71 is: 445.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.57 : 766.65 = 322.71 : x
  2. Step 2: Convert to fraction form
    555.57/766.65 = 322.71/x
  3. Step 3: Cross multiply
    555.57x = 766.65 × 322.71
  4. Step 4: Simplify right side
    555.57x = 247,405.62
  5. Step 5: Solve for x
    x = 247,405.62/555.57
  6. Step 6: Final answer
    x = 445.32

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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.