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Finding the Fourth Proportional to 498,312.33, 687,661.43 and 271,959.45

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Solution

The fourth proportional to 498,312.33, 687,661.43 and 271,959.45 is: 375,298.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,312.33 : 687,661.43 = 271,959.45 : x
  2. Step 2: Convert to fraction form
    498,312.33/687,661.43 = 271,959.45/x
  3. Step 3: Cross multiply
    498,312.33x = 687,661.43 × 271,959.45
  4. Step 4: Simplify right side
    498,312.33x = 187,016,022,929.22
  5. Step 5: Solve for x
    x = 187,016,022,929.22/498,312.33
  6. Step 6: Final answer
    x = 375,298.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.