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Finding the Fourth Proportional to 370.59, 555.70 and 216.55

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Solution

The fourth proportional to 370.59, 555.70 and 216.55 is: 324.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.59 : 555.70 = 216.55 : x
  2. Step 2: Convert to fraction form
    370.59/555.70 = 216.55/x
  3. Step 3: Cross multiply
    370.59x = 555.70 × 216.55
  4. Step 4: Simplify right side
    370.59x = 120,336.02
  5. Step 5: Solve for x
    x = 120,336.02/370.59
  6. Step 6: Final answer
    x = 324.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.