Home / 1,425,136.20-1,966,719.75-813,276.78

Finding the Fourth Proportional to 1,425,136.20, 1,966,719.75 and 813,276.78

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Solution

The fourth proportional to 1,425,136.20, 1,966,719.75 and 813,276.78 is: 1,122,340.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425,136.20 : 1,966,719.75 = 813,276.78 : x
  2. Step 2: Convert to fraction form
    1,425,136.20/1,966,719.75 = 813,276.78/x
  3. Step 3: Cross multiply
    1,425,136.20x = 1,966,719.75 × 813,276.78
  4. Step 4: Simplify right side
    1,425,136.20x = 1,599,487,505,442.41
  5. Step 5: Solve for x
    x = 1,599,487,505,442.41/1,425,136.20
  6. Step 6: Final answer
    x = 1,122,340.10

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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.