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Finding the Fourth Proportional to 370.13, 555.20 and 215.74

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Solution

The fourth proportional to 370.13, 555.20 and 215.74 is: 323.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.13 : 555.20 = 215.74 : x
  2. Step 2: Convert to fraction form
    370.13/555.20 = 215.74/x
  3. Step 3: Cross multiply
    370.13x = 555.20 × 215.74
  4. Step 4: Simplify right side
    370.13x = 119,774.99
  5. Step 5: Solve for x
    x = 119,774.99/370.13
  6. Step 6: Final answer
    x = 323.60

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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.