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Finding the Fourth Proportional to 370.13, 555.21 and 153.86

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Solution

The fourth proportional to 370.13, 555.21 and 153.86 is: 230.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.13 : 555.21 = 153.86 : x
  2. Step 2: Convert to fraction form
    370.13/555.21 = 153.86/x
  3. Step 3: Cross multiply
    370.13x = 555.21 × 153.86
  4. Step 4: Simplify right side
    370.13x = 85,421.83
  5. Step 5: Solve for x
    x = 85,421.83/370.13
  6. Step 6: Final answer
    x = 230.79

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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.