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Finding the Fourth Proportional to 404,312.80, 606,469.20 and 138,009.10

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Solution

The fourth proportional to 404,312.80, 606,469.20 and 138,009.10 is: 207,013.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,312.80 : 606,469.20 = 138,009.10 : x
  2. Step 2: Convert to fraction form
    404,312.80/606,469.20 = 138,009.10/x
  3. Step 3: Cross multiply
    404,312.80x = 606,469.20 × 138,009.10
  4. Step 4: Simplify right side
    404,312.80x = 83,698,268,469.72
  5. Step 5: Solve for x
    x = 83,698,268,469.72/404,312.80
  6. Step 6: Final answer
    x = 207,013.65

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.