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Finding the Fourth Proportional to 485,921.67, 728,799.47 and 130,852.65

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Solution

The fourth proportional to 485,921.67, 728,799.47 and 130,852.65 is: 196,256.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,921.67 : 728,799.47 = 130,852.65 : x
  2. Step 2: Convert to fraction form
    485,921.67/728,799.47 = 130,852.65/x
  3. Step 3: Cross multiply
    485,921.67x = 728,799.47 × 130,852.65
  4. Step 4: Simplify right side
    485,921.67x = 95,365,343,420.65
  5. Step 5: Solve for x
    x = 95,365,343,420.65/485,921.67
  6. Step 6: Final answer
    x = 196,256.62

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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.