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Finding the Fourth Proportional to 925.82, 1,387.49 and 340.28

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Solution

The fourth proportional to 925.82, 1,387.49 and 340.28 is: 509.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.82 : 1,387.49 = 340.28 : x
  2. Step 2: Convert to fraction form
    925.82/1,387.49 = 340.28/x
  3. Step 3: Cross multiply
    925.82x = 1,387.49 × 340.28
  4. Step 4: Simplify right side
    925.82x = 472,126.46
  5. Step 5: Solve for x
    x = 472,126.46/925.82
  6. Step 6: Final answer
    x = 509.96

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1.5x scale

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.