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Finding the Fourth Proportional to 612,054.80, 918,082.20 and 280,278.80

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Solution

The fourth proportional to 612,054.80, 918,082.20 and 280,278.80 is: 420,418.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,054.80 : 918,082.20 = 280,278.80 : x
  2. Step 2: Convert to fraction form
    612,054.80/918,082.20 = 280,278.80/x
  3. Step 3: Cross multiply
    612,054.80x = 918,082.20 × 280,278.80
  4. Step 4: Simplify right side
    612,054.80x = 257,318,977,317.36
  5. Step 5: Solve for x
    x = 257,318,977,317.36/612,054.80
  6. Step 6: Final answer
    x = 420,418.20

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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.