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Finding the Fourth Proportional to 485,684.09, 728,460.51 and 130,719.41

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Solution

The fourth proportional to 485,684.09, 728,460.51 and 130,719.41 is: 196,061.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,684.09 : 728,460.51 = 130,719.41 : x
  2. Step 2: Convert to fraction form
    485,684.09/728,460.51 = 130,719.41/x
  3. Step 3: Cross multiply
    485,684.09x = 728,460.51 × 130,719.41
  4. Step 4: Simplify right side
    485,684.09x = 95,223,924,433.20
  5. Step 5: Solve for x
    x = 95,223,924,433.20/485,684.09
  6. Step 6: Final answer
    x = 196,061.45

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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.