Home / 1,278,228.74-1,917,391.70-425,376.50

Finding the Fourth Proportional to 1,278,228.74, 1,917,391.70 and 425,376.50

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Solution

The fourth proportional to 1,278,228.74, 1,917,391.70 and 425,376.50 is: 638,080.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,228.74 : 1,917,391.70 = 425,376.50 : x
  2. Step 2: Convert to fraction form
    1,278,228.74/1,917,391.70 = 425,376.50/x
  3. Step 3: Cross multiply
    1,278,228.74x = 1,917,391.70 × 425,376.50
  4. Step 4: Simplify right side
    1,278,228.74x = 815,613,361,951.53
  5. Step 5: Solve for x
    x = 815,613,361,951.53/1,278,228.74
  6. Step 6: Final answer
    x = 638,080.92

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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.