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Finding the Fourth Proportional to 372.99, 514.41 and 312.93

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Solution

The fourth proportional to 372.99, 514.41 and 312.93 is: 431.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.99 : 514.41 = 312.93 : x
  2. Step 2: Convert to fraction form
    372.99/514.41 = 312.93/x
  3. Step 3: Cross multiply
    372.99x = 514.41 × 312.93
  4. Step 4: Simplify right side
    372.99x = 160,972.76
  5. Step 5: Solve for x
    x = 160,972.76/372.99
  6. Step 6: Final answer
    x = 431.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.