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Finding the Fourth Proportional to 245,458.47, 338,730.57 and 138,026.20

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Solution

The fourth proportional to 245,458.47, 338,730.57 and 138,026.20 is: 190,474.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,458.47 : 338,730.57 = 138,026.20 : x
  2. Step 2: Convert to fraction form
    245,458.47/338,730.57 = 138,026.20/x
  3. Step 3: Cross multiply
    245,458.47x = 338,730.57 × 138,026.20
  4. Step 4: Simplify right side
    245,458.47x = 46,753,693,400.93
  5. Step 5: Solve for x
    x = 46,753,693,400.93/245,458.47
  6. Step 6: Final answer
    x = 190,474.96

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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.