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Finding the Fourth Proportional to 520,173.88, 780,287.86 and 165,215.68

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Solution

The fourth proportional to 520,173.88, 780,287.86 and 165,215.68 is: 247,832.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,173.88 : 780,287.86 = 165,215.68 : x
  2. Step 2: Convert to fraction form
    520,173.88/780,287.86 = 165,215.68/x
  3. Step 3: Cross multiply
    520,173.88x = 780,287.86 × 165,215.68
  4. Step 4: Simplify right side
    520,173.88x = 128,915,789,385.65
  5. Step 5: Solve for x
    x = 128,915,789,385.65/520,173.88
  6. Step 6: Final answer
    x = 247,832.11

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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.