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Finding the Fourth Proportional to 612,121.20, 918,181.80 and 238,144.20

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Solution

The fourth proportional to 612,121.20, 918,181.80 and 238,144.20 is: 357,216.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,121.20 : 918,181.80 = 238,144.20 : x
  2. Step 2: Convert to fraction form
    612,121.20/918,181.80 = 238,144.20/x
  3. Step 3: Cross multiply
    612,121.20x = 918,181.80 × 238,144.20
  4. Step 4: Simplify right side
    612,121.20x = 218,659,670,215.56
  5. Step 5: Solve for x
    x = 218,659,670,215.56/612,121.20
  6. Step 6: Final answer
    x = 357,216.30

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Double scale
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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.