Home / 578,738.40-866,941.20-329,128.80

Finding the Fourth Proportional to 578,738.40, 866,941.20 and 329,128.80

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Solution

The fourth proportional to 578,738.40, 866,941.20 and 329,128.80 is: 493,029.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,738.40 : 866,941.20 = 329,128.80 : x
  2. Step 2: Convert to fraction form
    578,738.40/866,941.20 = 329,128.80/x
  3. Step 3: Cross multiply
    578,738.40x = 866,941.20 × 329,128.80
  4. Step 4: Simplify right side
    578,738.40x = 285,335,316,826.56
  5. Step 5: Solve for x
    x = 285,335,316,826.56/578,738.40
  6. Step 6: Final answer
    x = 493,029.87

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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.