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Finding the Fourth Proportional to 372.93, 515.16 and 278.63

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Solution

The fourth proportional to 372.93, 515.16 and 278.63 is: 384.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.93 : 515.16 = 278.63 : x
  2. Step 2: Convert to fraction form
    372.93/515.16 = 278.63/x
  3. Step 3: Cross multiply
    372.93x = 515.16 × 278.63
  4. Step 4: Simplify right side
    372.93x = 143,536.46
  5. Step 5: Solve for x
    x = 143,536.46/372.93
  6. Step 6: Final answer
    x = 384.89

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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.