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Finding the Fourth Proportional to 485,973.38, 728,876.99 and 130,904.36

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Solution

The fourth proportional to 485,973.38, 728,876.99 and 130,904.36 is: 196,334.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,973.38 : 728,876.99 = 130,904.36 : x
  2. Step 2: Convert to fraction form
    485,973.38/728,876.99 = 130,904.36/x
  3. Step 3: Cross multiply
    485,973.38x = 728,876.99 × 130,904.36
  4. Step 4: Simplify right side
    485,973.38x = 95,413,175,894.68
  5. Step 5: Solve for x
    x = 95,413,175,894.68/485,973.38
  6. Step 6: Final answer
    x = 196,334.16

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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.