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Finding the Fourth Proportional to 925.45, 1,387.15 and 651.46

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Solution

The fourth proportional to 925.45, 1,387.15 and 651.46 is: 976.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.45 : 1,387.15 = 651.46 : x
  2. Step 2: Convert to fraction form
    925.45/1,387.15 = 651.46/x
  3. Step 3: Cross multiply
    925.45x = 1,387.15 × 651.46
  4. Step 4: Simplify right side
    925.45x = 903,672.74
  5. Step 5: Solve for x
    x = 903,672.74/925.45
  6. Step 6: Final answer
    x = 976.47

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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.