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Finding the Fourth Proportional to 379,987.20, 569,903.04 and 130,688.64

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Solution

The fourth proportional to 379,987.20, 569,903.04 and 130,688.64 is: 196,006.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,987.20 : 569,903.04 = 130,688.64 : x
  2. Step 2: Convert to fraction form
    379,987.20/569,903.04 = 130,688.64/x
  3. Step 3: Cross multiply
    379,987.20x = 569,903.04 × 130,688.64
  4. Step 4: Simplify right side
    379,987.20x = 74,479,853,229.47
  5. Step 5: Solve for x
    x = 74,479,853,229.47/379,987.20
  6. Step 6: Final answer
    x = 196,006.22

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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.