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Finding the Fourth Proportional to 265,694.01, 398,618.66 and 85,775.22

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Solution

The fourth proportional to 265,694.01, 398,618.66 and 85,775.22 is: 128,687.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,694.01 : 398,618.66 = 85,775.22 : x
  2. Step 2: Convert to fraction form
    265,694.01/398,618.66 = 85,775.22/x
  3. Step 3: Cross multiply
    265,694.01x = 398,618.66 × 85,775.22
  4. Step 4: Simplify right side
    265,694.01x = 34,191,601,655.57
  5. Step 5: Solve for x
    x = 34,191,601,655.57/265,694.01
  6. Step 6: Final answer
    x = 128,687.89

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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.