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Finding the Fourth Proportional to 614,434.80, 921,749.40 and 215,065.92

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Solution

The fourth proportional to 614,434.80, 921,749.40 and 215,065.92 is: 322,632.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,434.80 : 921,749.40 = 215,065.92 : x
  2. Step 2: Convert to fraction form
    614,434.80/921,749.40 = 215,065.92/x
  3. Step 3: Cross multiply
    614,434.80x = 921,749.40 × 215,065.92
  4. Step 4: Simplify right side
    614,434.80x = 198,236,882,720.45
  5. Step 5: Solve for x
    x = 198,236,882,720.45/614,434.80
  6. Step 6: Final answer
    x = 322,632.90

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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.