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Finding the Fourth Proportional to 490,642.56, 735,987.60 and 135,648.72

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Solution

The fourth proportional to 490,642.56, 735,987.60 and 135,648.72 is: 203,479.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,642.56 : 735,987.60 = 135,648.72 : x
  2. Step 2: Convert to fraction form
    490,642.56/735,987.60 = 135,648.72/x
  3. Step 3: Cross multiply
    490,642.56x = 735,987.60 × 135,648.72
  4. Step 4: Simplify right side
    490,642.56x = 99,835,775,875.87
  5. Step 5: Solve for x
    x = 99,835,775,875.87/490,642.56
  6. Step 6: Final answer
    x = 203,479.65

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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.