Home / 1,380,792.12-1,905,036.48-807,426.42

Finding the Fourth Proportional to 1,380,792.12, 1,905,036.48 and 807,426.42

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Solution

The fourth proportional to 1,380,792.12, 1,905,036.48 and 807,426.42 is: 1,113,981.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,792.12 : 1,905,036.48 = 807,426.42 : x
  2. Step 2: Convert to fraction form
    1,380,792.12/1,905,036.48 = 807,426.42/x
  3. Step 3: Cross multiply
    1,380,792.12x = 1,905,036.48 × 807,426.42
  4. Step 4: Simplify right side
    1,380,792.12x = 1,538,176,785,015.80
  5. Step 5: Solve for x
    x = 1,538,176,785,015.80/1,380,792.12
  6. Step 6: Final answer
    x = 1,113,981.43

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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.