Home / 1,428,576.85-1,970,874.87-816,401.20

Finding the Fourth Proportional to 1,428,576.85, 1,970,874.87 and 816,401.20

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Solution

The fourth proportional to 1,428,576.85, 1,970,874.87 and 816,401.20 is: 1,126,312.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,576.85 : 1,970,874.87 = 816,401.20 : x
  2. Step 2: Convert to fraction form
    1,428,576.85/1,970,874.87 = 816,401.20/x
  3. Step 3: Cross multiply
    1,428,576.85x = 1,970,874.87 × 816,401.20
  4. Step 4: Simplify right side
    1,428,576.85x = 1,609,024,609,216.80
  5. Step 5: Solve for x
    x = 1,609,024,609,216.80/1,428,576.85
  6. Step 6: Final answer
    x = 1,126,312.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.