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Finding the Fourth Proportional to 555.12, 766.53 and 358.56

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Solution

The fourth proportional to 555.12, 766.53 and 358.56 is: 495.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.12 : 766.53 = 358.56 : x
  2. Step 2: Convert to fraction form
    555.12/766.53 = 358.56/x
  3. Step 3: Cross multiply
    555.12x = 766.53 × 358.56
  4. Step 4: Simplify right side
    555.12x = 274,847.00
  5. Step 5: Solve for x
    x = 274,847.00/555.12
  6. Step 6: Final answer
    x = 495.11

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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.