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Finding the Fourth Proportional to 925.19, 1,388.14 and 308.98

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Solution

The fourth proportional to 925.19, 1,388.14 and 308.98 is: 463.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.19 : 1,388.14 = 308.98 : x
  2. Step 2: Convert to fraction form
    925.19/1,388.14 = 308.98/x
  3. Step 3: Cross multiply
    925.19x = 1,388.14 × 308.98
  4. Step 4: Simplify right side
    925.19x = 428,908.46
  5. Step 5: Solve for x
    x = 428,908.46/925.19
  6. Step 6: Final answer
    x = 463.59

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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.