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Finding the Fourth Proportional to 260,452.80, 390,690.72 and 82,972.80

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Solution

The fourth proportional to 260,452.80, 390,690.72 and 82,972.80 is: 124,462.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,452.80 : 390,690.72 = 82,972.80 : x
  2. Step 2: Convert to fraction form
    260,452.80/390,690.72 = 82,972.80/x
  3. Step 3: Cross multiply
    260,452.80x = 390,690.72 × 82,972.80
  4. Step 4: Simplify right side
    260,452.80x = 32,416,702,972.42
  5. Step 5: Solve for x
    x = 32,416,702,972.42/260,452.80
  6. Step 6: Final answer
    x = 124,462.87

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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.