Home / 1,278,408.24-1,915,250.40-645,811.20

Finding the Fourth Proportional to 1,278,408.24, 1,915,250.40 and 645,811.20

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Solution

The fourth proportional to 1,278,408.24, 1,915,250.40 and 645,811.20 is: 967,523.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,408.24 : 1,915,250.40 = 645,811.20 : x
  2. Step 2: Convert to fraction form
    1,278,408.24/1,915,250.40 = 645,811.20/x
  3. Step 3: Cross multiply
    1,278,408.24x = 1,915,250.40 × 645,811.20
  4. Step 4: Simplify right side
    1,278,408.24x = 1,236,890,159,124.48
  5. Step 5: Solve for x
    x = 1,236,890,159,124.48/1,278,408.24
  6. Step 6: Final answer
    x = 967,523.61

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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.