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Finding the Fourth Proportional to 1,546.70, 2,319.84 and 392.45

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Solution

The fourth proportional to 1,546.70, 2,319.84 and 392.45 is: 588.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,546.70 : 2,319.84 = 392.45 : x
  2. Step 2: Convert to fraction form
    1,546.70/2,319.84 = 392.45/x
  3. Step 3: Cross multiply
    1,546.70x = 2,319.84 × 392.45
  4. Step 4: Simplify right side
    1,546.70x = 910,409.61
  5. Step 5: Solve for x
    x = 910,409.61/1,546.70
  6. Step 6: Final answer
    x = 588.62

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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.