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Finding the Fourth Proportional to 485,389.59, 727,512.52 and 218,838.03

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Solution

The fourth proportional to 485,389.59, 727,512.52 and 218,838.03 is: 327,999.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,389.59 : 727,512.52 = 218,838.03 : x
  2. Step 2: Convert to fraction form
    485,389.59/727,512.52 = 218,838.03/x
  3. Step 3: Cross multiply
    485,389.59x = 727,512.52 × 218,838.03
  4. Step 4: Simplify right side
    485,389.59x = 159,207,406,677.14
  5. Step 5: Solve for x
    x = 159,207,406,677.14/485,389.59
  6. Step 6: Final answer
    x = 327,999.22

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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.