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Finding the Fourth Proportional to 372.78, 514.40 and 207

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Solution

The fourth proportional to 372.78, 514.40 and 207 is: 285.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.78 : 514.40 = 207 : x
  2. Step 2: Convert to fraction form
    372.78/514.40 = 207/x
  3. Step 3: Cross multiply
    372.78x = 514.40 × 207
  4. Step 4: Simplify right side
    372.78x = 106,480.80
  5. Step 5: Solve for x
    x = 106,480.80/372.78
  6. Step 6: Final answer
    x = 285.64

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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.