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Finding the Fourth Proportional to 265,765.03, 398,687.70 and 85,790.32

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Solution

The fourth proportional to 265,765.03, 398,687.70 and 85,790.32 is: 128,698.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,765.03 : 398,687.70 = 85,790.32 : x
  2. Step 2: Convert to fraction form
    265,765.03/398,687.70 = 85,790.32/x
  3. Step 3: Cross multiply
    265,765.03x = 398,687.70 × 85,790.32
  4. Step 4: Simplify right side
    265,765.03x = 34,203,545,363.06
  5. Step 5: Solve for x
    x = 34,203,545,363.06/265,765.03
  6. Step 6: Final answer
    x = 128,698.44

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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.