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Finding the Fourth Proportional to 345,657.20, 517,999.80 and 274,701.20

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Solution

The fourth proportional to 345,657.20, 517,999.80 and 274,701.20 is: 411,665.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,657.20 : 517,999.80 = 274,701.20 : x
  2. Step 2: Convert to fraction form
    345,657.20/517,999.80 = 274,701.20/x
  3. Step 3: Cross multiply
    345,657.20x = 517,999.80 × 274,701.20
  4. Step 4: Simplify right side
    345,657.20x = 142,295,166,659.76
  5. Step 5: Solve for x
    x = 142,295,166,659.76/345,657.20
  6. Step 6: Final answer
    x = 411,665.57

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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.