Home / 1,238,432.96-1,708,872.18-687,139.86

Finding the Fourth Proportional to 1,238,432.96, 1,708,872.18 and 687,139.86

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Solution

The fourth proportional to 1,238,432.96, 1,708,872.18 and 687,139.86 is: 948,161.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,432.96 : 1,708,872.18 = 687,139.86 : x
  2. Step 2: Convert to fraction form
    1,238,432.96/1,708,872.18 = 687,139.86/x
  3. Step 3: Cross multiply
    1,238,432.96x = 1,708,872.18 × 687,139.86
  4. Step 4: Simplify right side
    1,238,432.96x = 1,174,234,190,523.09
  5. Step 5: Solve for x
    x = 1,174,234,190,523.09/1,238,432.96
  6. Step 6: Final answer
    x = 948,161.29

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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.