Home / 1,386,092.46-1,912,823.55-813,142.38

Finding the Fourth Proportional to 1,386,092.46, 1,912,823.55 and 813,142.38

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Solution

The fourth proportional to 1,386,092.46, 1,912,823.55 and 813,142.38 is: 1,122,145.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,092.46 : 1,912,823.55 = 813,142.38 : x
  2. Step 2: Convert to fraction form
    1,386,092.46/1,912,823.55 = 813,142.38/x
  3. Step 3: Cross multiply
    1,386,092.46x = 1,912,823.55 × 813,142.38
  4. Step 4: Simplify right side
    1,386,092.46x = 1,555,397,893,967.05
  5. Step 5: Solve for x
    x = 1,555,397,893,967.05/1,386,092.46
  6. Step 6: Final answer
    x = 1,122,145.84

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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.