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Finding the Fourth Proportional to 260,165.20, 390,164.76 and 82,630.68

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Solution

The fourth proportional to 260,165.20, 390,164.76 and 82,630.68 is: 123,919.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,165.20 : 390,164.76 = 82,630.68 : x
  2. Step 2: Convert to fraction form
    260,165.20/390,164.76 = 82,630.68/x
  3. Step 3: Cross multiply
    260,165.20x = 390,164.76 × 82,630.68
  4. Step 4: Simplify right side
    260,165.20x = 32,239,579,430.84
  5. Step 5: Solve for x
    x = 32,239,579,430.84/260,165.20
  6. Step 6: Final answer
    x = 123,919.65

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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.