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Finding the Fourth Proportional to 265,643.60, 398,572.20 and 107,884.40

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Solution

The fourth proportional to 265,643.60, 398,572.20 and 107,884.40 is: 161,869.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,643.60 : 398,572.20 = 107,884.40 : x
  2. Step 2: Convert to fraction form
    265,643.60/398,572.20 = 107,884.40/x
  3. Step 3: Cross multiply
    265,643.60x = 398,572.20 × 107,884.40
  4. Step 4: Simplify right side
    265,643.60x = 42,999,722,653.68
  5. Step 5: Solve for x
    x = 42,999,722,653.68/265,643.60
  6. Step 6: Final answer
    x = 161,869.97

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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.