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Finding the Fourth Proportional to 518,009.96, 777,120.34 and 218,491.60

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Solution

The fourth proportional to 518,009.96, 777,120.34 and 218,491.60 is: 327,781.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,009.96 : 777,120.34 = 218,491.60 : x
  2. Step 2: Convert to fraction form
    518,009.96/777,120.34 = 218,491.60/x
  3. Step 3: Cross multiply
    518,009.96x = 777,120.34 × 218,491.60
  4. Step 4: Simplify right side
    518,009.96x = 169,794,266,479.14
  5. Step 5: Solve for x
    x = 169,794,266,479.14/518,009.96
  6. Step 6: Final answer
    x = 327,781.86

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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.