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Finding the Fourth Proportional to 925.46, 1,388.57 and 340.50

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Solution

The fourth proportional to 925.46, 1,388.57 and 340.50 is: 510.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.46 : 1,388.57 = 340.50 : x
  2. Step 2: Convert to fraction form
    925.46/1,388.57 = 340.50/x
  3. Step 3: Cross multiply
    925.46x = 1,388.57 × 340.50
  4. Step 4: Simplify right side
    925.46x = 472,806.38
  5. Step 5: Solve for x
    x = 472,806.38/925.46
  6. Step 6: Final answer
    x = 510.89

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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.