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Finding the Fourth Proportional to 404,666.10, 606,999.15 and 138,338.10

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Solution

The fourth proportional to 404,666.10, 606,999.15 and 138,338.10 is: 207,507.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,666.10 : 606,999.15 = 138,338.10 : x
  2. Step 2: Convert to fraction form
    404,666.10/606,999.15 = 138,338.10/x
  3. Step 3: Cross multiply
    404,666.10x = 606,999.15 × 138,338.10
  4. Step 4: Simplify right side
    404,666.10x = 83,971,109,112.62
  5. Step 5: Solve for x
    x = 83,971,109,112.62/404,666.10
  6. Step 6: Final answer
    x = 207,507.15

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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.