Home / 1,318,719.40-1,976,523.90-687,308.20

Finding the Fourth Proportional to 1,318,719.40, 1,976,523.90 and 687,308.20

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Solution

The fourth proportional to 1,318,719.40, 1,976,523.90 and 687,308.20 is: 1,030,151.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,719.40 : 1,976,523.90 = 687,308.20 : x
  2. Step 2: Convert to fraction form
    1,318,719.40/1,976,523.90 = 687,308.20/x
  3. Step 3: Cross multiply
    1,318,719.40x = 1,976,523.90 × 687,308.20
  4. Step 4: Simplify right side
    1,318,719.40x = 1,358,481,083,965.98
  5. Step 5: Solve for x
    x = 1,358,481,083,965.98/1,318,719.40
  6. Step 6: Final answer
    x = 1,030,151.74

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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.