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Finding the Fourth Proportional to 260,432.40, 390,670.20 and 82,934.40

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Solution

The fourth proportional to 260,432.40, 390,670.20 and 82,934.40 is: 124,408.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,432.40 : 390,670.20 = 82,934.40 : x
  2. Step 2: Convert to fraction form
    260,432.40/390,670.20 = 82,934.40/x
  3. Step 3: Cross multiply
    260,432.40x = 390,670.20 × 82,934.40
  4. Step 4: Simplify right side
    260,432.40x = 32,399,998,634.88
  5. Step 5: Solve for x
    x = 32,399,998,634.88/260,432.40
  6. Step 6: Final answer
    x = 124,408.48

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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.