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Finding the Fourth Proportional to 370.17, 555.12 and 207.90

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Solution

The fourth proportional to 370.17, 555.12 and 207.90 is: 311.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.17 : 555.12 = 207.90 : x
  2. Step 2: Convert to fraction form
    370.17/555.12 = 207.90/x
  3. Step 3: Cross multiply
    370.17x = 555.12 × 207.90
  4. Step 4: Simplify right side
    370.17x = 115,409.45
  5. Step 5: Solve for x
    x = 115,409.45/370.17
  6. Step 6: Final answer
    x = 311.77

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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.