Home / 781,881.31-1,078,439.86-717,558.30

Finding the Fourth Proportional to 781,881.31, 1,078,439.86 and 717,558.30

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Solution

The fourth proportional to 781,881.31, 1,078,439.86 and 717,558.30 is: 989,719.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,881.31 : 1,078,439.86 = 717,558.30 : x
  2. Step 2: Convert to fraction form
    781,881.31/1,078,439.86 = 717,558.30/x
  3. Step 3: Cross multiply
    781,881.31x = 1,078,439.86 × 717,558.30
  4. Step 4: Simplify right side
    781,881.31x = 773,843,472,487.65
  5. Step 5: Solve for x
    x = 773,843,472,487.65/781,881.31
  6. Step 6: Final answer
    x = 989,719.88

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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.