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Finding the Fourth Proportional to 260,082.40, 390,134.40 and 82,584.40

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Solution

The fourth proportional to 260,082.40, 390,134.40 and 82,584.40 is: 123,880.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,082.40 : 390,134.40 = 82,584.40 : x
  2. Step 2: Convert to fraction form
    260,082.40/390,134.40 = 82,584.40/x
  3. Step 3: Cross multiply
    260,082.40x = 390,134.40 × 82,584.40
  4. Step 4: Simplify right side
    260,082.40x = 32,219,015,343.36
  5. Step 5: Solve for x
    x = 32,219,015,343.36/260,082.40
  6. Step 6: Final answer
    x = 123,880.03

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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.