Home / 812,630.85-1,219,140.68-391,560.45

Finding the Fourth Proportional to 812,630.85, 1,219,140.68 and 391,560.45

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Solution

The fourth proportional to 812,630.85, 1,219,140.68 and 391,560.45 is: 587,434.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,630.85 : 1,219,140.68 = 391,560.45 : x
  2. Step 2: Convert to fraction form
    812,630.85/1,219,140.68 = 391,560.45/x
  3. Step 3: Cross multiply
    812,630.85x = 1,219,140.68 × 391,560.45
  4. Step 4: Simplify right side
    812,630.85x = 477,367,271,316.30
  5. Step 5: Solve for x
    x = 477,367,271,316.30/812,630.85
  6. Step 6: Final answer
    x = 587,434.35

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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.