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Finding the Fourth Proportional to 370.86, 553.61 and 316.20

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Solution

The fourth proportional to 370.86, 553.61 and 316.20 is: 472.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.86 : 553.61 = 316.20 : x
  2. Step 2: Convert to fraction form
    370.86/553.61 = 316.20/x
  3. Step 3: Cross multiply
    370.86x = 553.61 × 316.20
  4. Step 4: Simplify right side
    370.86x = 175,049.90
  5. Step 5: Solve for x
    x = 175,049.90/370.86
  6. Step 6: Final answer
    x = 472.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.