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Finding the Fourth Proportional to 404,728.90, 606,987.60 and 120,342.88

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Solution

The fourth proportional to 404,728.90, 606,987.60 and 120,342.88 is: 180,482.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,728.90 : 606,987.60 = 120,342.88 : x
  2. Step 2: Convert to fraction form
    404,728.90/606,987.60 = 120,342.88/x
  3. Step 3: Cross multiply
    404,728.90x = 606,987.60 × 120,342.88
  4. Step 4: Simplify right side
    404,728.90x = 73,046,635,908.29
  5. Step 5: Solve for x
    x = 73,046,635,908.29/404,728.90
  6. Step 6: Final answer
    x = 180,482.88

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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.