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Finding the Fourth Proportional to 1,386,422, 2,079,633 and 499,958

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Solution

The fourth proportional to 1,386,422, 2,079,633 and 499,958 is: 749,937

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,422 : 2,079,633 = 499,958 : x
  2. Step 2: Convert to fraction form
    1,386,422/2,079,633 = 499,958/x
  3. Step 3: Cross multiply
    1,386,422x = 2,079,633 × 499,958
  4. Step 4: Simplify right side
    1,386,422x = 1,039,729,155,414
  5. Step 5: Solve for x
    x = 1,039,729,155,414/1,386,422
  6. Step 6: Final answer
    x = 749,937

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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.