Home / 821,536.65-1,231,203.47-639,387.46

Finding the Fourth Proportional to 821,536.65, 1,231,203.47 and 639,387.46

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Solution

The fourth proportional to 821,536.65, 1,231,203.47 and 639,387.46 is: 958,223.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,536.65 : 1,231,203.47 = 639,387.46 : x
  2. Step 2: Convert to fraction form
    821,536.65/1,231,203.47 = 639,387.46/x
  3. Step 3: Cross multiply
    821,536.65x = 1,231,203.47 × 639,387.46
  4. Step 4: Simplify right side
    821,536.65x = 787,216,059,426.49
  5. Step 5: Solve for x
    x = 787,216,059,426.49/821,536.65
  6. Step 6: Final answer
    x = 958,223.91

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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.