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Finding the Fourth Proportional to 245,626.80, 338,977.08 and 138,191.28

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Solution

The fourth proportional to 245,626.80, 338,977.08 and 138,191.28 is: 190,710.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,626.80 : 338,977.08 = 138,191.28 : x
  2. Step 2: Convert to fraction form
    245,626.80/338,977.08 = 138,191.28/x
  3. Step 3: Cross multiply
    245,626.80x = 338,977.08 × 138,191.28
  4. Step 4: Simplify right side
    245,626.80x = 46,843,676,575.86
  5. Step 5: Solve for x
    x = 46,843,676,575.86/245,626.80
  6. Step 6: Final answer
    x = 190,710.77

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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.