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Finding the Fourth Proportional to 1,458.56, 2,188.20 and 432.56

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Solution

The fourth proportional to 1,458.56, 2,188.20 and 432.56 is: 648.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,458.56 : 2,188.20 = 432.56 : x
  2. Step 2: Convert to fraction form
    1,458.56/2,188.20 = 432.56/x
  3. Step 3: Cross multiply
    1,458.56x = 2,188.20 × 432.56
  4. Step 4: Simplify right side
    1,458.56x = 946,527.79
  5. Step 5: Solve for x
    x = 946,527.79/1,458.56
  6. Step 6: Final answer
    x = 648.95

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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.