Home / 1,387,429.20-2,079,761.40-638,168.40

Finding the Fourth Proportional to 1,387,429.20, 2,079,761.40 and 638,168.40

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Solution

The fourth proportional to 1,387,429.20, 2,079,761.40 and 638,168.40 is: 956,616.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,429.20 : 2,079,761.40 = 638,168.40 : x
  2. Step 2: Convert to fraction form
    1,387,429.20/2,079,761.40 = 638,168.40/x
  3. Step 3: Cross multiply
    1,387,429.20x = 2,079,761.40 × 638,168.40
  4. Step 4: Simplify right side
    1,387,429.20x = 1,327,238,005,019.76
  5. Step 5: Solve for x
    x = 1,327,238,005,019.76/1,387,429.20
  6. Step 6: Final answer
    x = 956,616.74

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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.