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Finding the Fourth Proportional to 265,071.60, 397,315.80 and 115,286.40

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Solution

The fourth proportional to 265,071.60, 397,315.80 and 115,286.40 is: 172,802.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,071.60 : 397,315.80 = 115,286.40 : x
  2. Step 2: Convert to fraction form
    265,071.60/397,315.80 = 115,286.40/x
  3. Step 3: Cross multiply
    265,071.60x = 397,315.80 × 115,286.40
  4. Step 4: Simplify right side
    265,071.60x = 45,805,108,245.12
  5. Step 5: Solve for x
    x = 45,805,108,245.12/265,071.60
  6. Step 6: Final answer
    x = 172,802.78

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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.