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Finding the Fourth Proportional to 245,442.35, 338,703.71 and 138,009.62

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Solution

The fourth proportional to 245,442.35, 338,703.71 and 138,009.62 is: 190,449.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,442.35 : 338,703.71 = 138,009.62 : x
  2. Step 2: Convert to fraction form
    245,442.35/338,703.71 = 138,009.62/x
  3. Step 3: Cross multiply
    245,442.35x = 338,703.71 × 138,009.62
  4. Step 4: Simplify right side
    245,442.35x = 46,744,367,926.12
  5. Step 5: Solve for x
    x = 46,744,367,926.12/245,442.35
  6. Step 6: Final answer
    x = 190,449.48

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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.