Home / 1,387,515.28-2,081,240.40-639,561.28

Finding the Fourth Proportional to 1,387,515.28, 2,081,240.40 and 639,561.28

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Solution

The fourth proportional to 1,387,515.28, 2,081,240.40 and 639,561.28 is: 959,326.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,515.28 : 2,081,240.40 = 639,561.28 : x
  2. Step 2: Convert to fraction form
    1,387,515.28/2,081,240.40 = 639,561.28/x
  3. Step 3: Cross multiply
    1,387,515.28x = 2,081,240.40 × 639,561.28
  4. Step 4: Simplify right side
    1,387,515.28x = 1,331,080,774,211.71
  5. Step 5: Solve for x
    x = 1,331,080,774,211.71/1,387,515.28
  6. Step 6: Final answer
    x = 959,326.93

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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.