Home / 1,389,712.86-1,917,642.60-777,899.88

Finding the Fourth Proportional to 1,389,712.86, 1,917,642.60 and 777,899.88

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Solution

The fourth proportional to 1,389,712.86, 1,917,642.60 and 777,899.88 is: 1,073,411.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,712.86 : 1,917,642.60 = 777,899.88 : x
  2. Step 2: Convert to fraction form
    1,389,712.86/1,917,642.60 = 777,899.88/x
  3. Step 3: Cross multiply
    1,389,712.86x = 1,917,642.60 × 777,899.88
  4. Step 4: Simplify right side
    1,389,712.86x = 1,491,733,948,422.89
  5. Step 5: Solve for x
    x = 1,491,733,948,422.89/1,389,712.86
  6. Step 6: Final answer
    x = 1,073,411.63

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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.