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Finding the Fourth Proportional to 386,843.52, 533,707.20 and 252,785.28

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Solution

The fourth proportional to 386,843.52, 533,707.20 and 252,785.28 is: 348,754.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,843.52 : 533,707.20 = 252,785.28 : x
  2. Step 2: Convert to fraction form
    386,843.52/533,707.20 = 252,785.28/x
  3. Step 3: Cross multiply
    386,843.52x = 533,707.20 × 252,785.28
  4. Step 4: Simplify right side
    386,843.52x = 134,913,323,990.02
  5. Step 5: Solve for x
    x = 134,913,323,990.02/386,843.52
  6. Step 6: Final answer
    x = 348,754.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.