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Finding the Fourth Proportional to 386,863.20, 580,294.80 and 245,145.60

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Solution

The fourth proportional to 386,863.20, 580,294.80 and 245,145.60 is: 367,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,863.20 : 580,294.80 = 245,145.60 : x
  2. Step 2: Convert to fraction form
    386,863.20/580,294.80 = 245,145.60/x
  3. Step 3: Cross multiply
    386,863.20x = 580,294.80 × 245,145.60
  4. Step 4: Simplify right side
    386,863.20x = 142,256,716,922.88
  5. Step 5: Solve for x
    x = 142,256,716,922.88/386,863.20
  6. Step 6: Final answer
    x = 367,718.40

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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.