Home / 1,435,963.72-1,981,281.90-815,630.80

Finding the Fourth Proportional to 1,435,963.72, 1,981,281.90 and 815,630.80

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Solution

The fourth proportional to 1,435,963.72, 1,981,281.90 and 815,630.80 is: 1,125,372.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435,963.72 : 1,981,281.90 = 815,630.80 : x
  2. Step 2: Convert to fraction form
    1,435,963.72/1,981,281.90 = 815,630.80/x
  3. Step 3: Cross multiply
    1,435,963.72x = 1,981,281.90 × 815,630.80
  4. Step 4: Simplify right side
    1,435,963.72x = 1,615,994,541,122.52
  5. Step 5: Solve for x
    x = 1,615,994,541,122.52/1,435,963.72
  6. Step 6: Final answer
    x = 1,125,372.82

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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.