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Finding the Fourth Proportional to 352,785.44, 487,266 and 257,138.72

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Solution

The fourth proportional to 352,785.44, 487,266 and 257,138.72 is: 355,159.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,785.44 : 487,266 = 257,138.72 : x
  2. Step 2: Convert to fraction form
    352,785.44/487,266 = 257,138.72/x
  3. Step 3: Cross multiply
    352,785.44x = 487,266 × 257,138.72
  4. Step 4: Simplify right side
    352,785.44x = 125,294,955,539.52
  5. Step 5: Solve for x
    x = 125,294,955,539.52/352,785.44
  6. Step 6: Final answer
    x = 355,159.09

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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.