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Finding the Fourth Proportional to 555.47, 766.55 and 322.73

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Solution

The fourth proportional to 555.47, 766.55 and 322.73 is: 445.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.47 : 766.55 = 322.73 : x
  2. Step 2: Convert to fraction form
    555.47/766.55 = 322.73/x
  3. Step 3: Cross multiply
    555.47x = 766.55 × 322.73
  4. Step 4: Simplify right side
    555.47x = 247,391.40
  5. Step 5: Solve for x
    x = 247,391.40/555.47
  6. Step 6: Final answer
    x = 445.37

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1.5x scale

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.