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Finding the Fourth Proportional to 245,648.10, 339,001.00 and 138,221.94

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Solution

The fourth proportional to 245,648.10, 339,001.00 and 138,221.94 is: 190,750.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,648.10 : 339,001.00 = 138,221.94 : x
  2. Step 2: Convert to fraction form
    245,648.10/339,001.00 = 138,221.94/x
  3. Step 3: Cross multiply
    245,648.10x = 339,001.00 × 138,221.94
  4. Step 4: Simplify right side
    245,648.10x = 46,857,375,536.39
  5. Step 5: Solve for x
    x = 46,857,375,536.39/245,648.10
  6. Step 6: Final answer
    x = 190,750.00

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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.