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Finding the Fourth Proportional to 612,022.80, 918,034.20 and 280,246.80

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Solution

The fourth proportional to 612,022.80, 918,034.20 and 280,246.80 is: 420,370.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,022.80 : 918,034.20 = 280,246.80 : x
  2. Step 2: Convert to fraction form
    612,022.80/918,034.20 = 280,246.80/x
  3. Step 3: Cross multiply
    612,022.80x = 918,034.20 × 280,246.80
  4. Step 4: Simplify right side
    612,022.80x = 257,276,146,840.56
  5. Step 5: Solve for x
    x = 257,276,146,840.56/612,022.80
  6. Step 6: Final answer
    x = 420,370.20

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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.