Home / 781,881.22-1,078,439.72-717,558.21

Finding the Fourth Proportional to 781,881.22, 1,078,439.72 and 717,558.21

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Solution

The fourth proportional to 781,881.22, 1,078,439.72 and 717,558.21 is: 989,719.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,881.22 : 1,078,439.72 = 717,558.21 : x
  2. Step 2: Convert to fraction form
    781,881.22/1,078,439.72 = 717,558.21/x
  3. Step 3: Cross multiply
    781,881.22x = 1,078,439.72 × 717,558.21
  4. Step 4: Simplify right side
    781,881.22x = 773,843,280,017.20
  5. Step 5: Solve for x
    x = 773,843,280,017.20/781,881.22
  6. Step 6: Final answer
    x = 989,719.75

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1.5x scale

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.