Home / 921,031.30-1,381,694.70-388,630.76

Finding the Fourth Proportional to 921,031.30, 1,381,694.70 and 388,630.76

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Solution

The fourth proportional to 921,031.30, 1,381,694.70 and 388,630.76 is: 583,008.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,031.30 : 1,381,694.70 = 388,630.76 : x
  2. Step 2: Convert to fraction form
    921,031.30/1,381,694.70 = 388,630.76/x
  3. Step 3: Cross multiply
    921,031.30x = 1,381,694.70 × 388,630.76
  4. Step 4: Simplify right side
    921,031.30x = 536,969,061,348.97
  5. Step 5: Solve for x
    x = 536,969,061,348.97/921,031.30
  6. Step 6: Final answer
    x = 583,008.48

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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.