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Finding the Fourth Proportional to 925.15, 1,276.78 and 552.15

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Solution

The fourth proportional to 925.15, 1,276.78 and 552.15 is: 762.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.15 : 1,276.78 = 552.15 : x
  2. Step 2: Convert to fraction form
    925.15/1,276.78 = 552.15/x
  3. Step 3: Cross multiply
    925.15x = 1,276.78 × 552.15
  4. Step 4: Simplify right side
    925.15x = 704,967.69
  5. Step 5: Solve for x
    x = 704,967.69/925.15
  6. Step 6: Final answer
    x = 762.00

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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.