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Finding the Fourth Proportional to 612,081.20, 918,121.80 and 237,861.20

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Solution

The fourth proportional to 612,081.20, 918,121.80 and 237,861.20 is: 356,791.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,081.20 : 918,121.80 = 237,861.20 : x
  2. Step 2: Convert to fraction form
    612,081.20/918,121.80 = 237,861.20/x
  3. Step 3: Cross multiply
    612,081.20x = 918,121.80 × 237,861.20
  4. Step 4: Simplify right side
    612,081.20x = 218,385,553,094.16
  5. Step 5: Solve for x
    x = 218,385,553,094.16/612,081.20
  6. Step 6: Final answer
    x = 356,791.80

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Similar ratio
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1.5x scale

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.