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Finding the Fourth Proportional to 257,515.20, 386,272.80 and 168,820.20

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Solution

The fourth proportional to 257,515.20, 386,272.80 and 168,820.20 is: 253,230.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,515.20 : 386,272.80 = 168,820.20 : x
  2. Step 2: Convert to fraction form
    257,515.20/386,272.80 = 168,820.20/x
  3. Step 3: Cross multiply
    257,515.20x = 386,272.80 × 168,820.20
  4. Step 4: Simplify right side
    257,515.20x = 65,210,651,350.56
  5. Step 5: Solve for x
    x = 65,210,651,350.56/257,515.20
  6. Step 6: Final answer
    x = 253,230.30

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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.