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Finding the Fourth Proportional to 555.59, 766.61 and 356.59

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Solution

The fourth proportional to 555.59, 766.61 and 356.59 is: 492.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.59 : 766.61 = 356.59 : x
  2. Step 2: Convert to fraction form
    555.59/766.61 = 356.59/x
  3. Step 3: Cross multiply
    555.59x = 766.61 × 356.59
  4. Step 4: Simplify right side
    555.59x = 273,365.46
  5. Step 5: Solve for x
    x = 273,365.46/555.59
  6. Step 6: Final answer
    x = 492.03

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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.