Home / 812,638.10-1,219,151.55-391,567.70

Finding the Fourth Proportional to 812,638.10, 1,219,151.55 and 391,567.70

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Solution

The fourth proportional to 812,638.10, 1,219,151.55 and 391,567.70 is: 587,445.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,638.10 : 1,219,151.55 = 391,567.70 : x
  2. Step 2: Convert to fraction form
    812,638.10/1,219,151.55 = 391,567.70/x
  3. Step 3: Cross multiply
    812,638.10x = 1,219,151.55 × 391,567.70
  4. Step 4: Simplify right side
    812,638.10x = 477,380,368,384.94
  5. Step 5: Solve for x
    x = 477,380,368,384.94/812,638.10
  6. Step 6: Final answer
    x = 587,445.22

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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.