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Finding the Fourth Proportional to 325,864.80, 488,440.80 and 115,394.40

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Solution

The fourth proportional to 325,864.80, 488,440.80 and 115,394.40 is: 172,965.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,864.80 : 488,440.80 = 115,394.40 : x
  2. Step 2: Convert to fraction form
    325,864.80/488,440.80 = 115,394.40/x
  3. Step 3: Cross multiply
    325,864.80x = 488,440.80 × 115,394.40
  4. Step 4: Simplify right side
    325,864.80x = 56,363,333,051.52
  5. Step 5: Solve for x
    x = 56,363,333,051.52/325,864.80
  6. Step 6: Final answer
    x = 172,965.39

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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.