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Finding the Fourth Proportional to 1,095.47, 1,641.98 and 548.11

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Solution

The fourth proportional to 1,095.47, 1,641.98 and 548.11 is: 821.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095.47 : 1,641.98 = 548.11 : x
  2. Step 2: Convert to fraction form
    1,095.47/1,641.98 = 548.11/x
  3. Step 3: Cross multiply
    1,095.47x = 1,641.98 × 548.11
  4. Step 4: Simplify right side
    1,095.47x = 899,982.92
  5. Step 5: Solve for x
    x = 899,982.92/1,095.47
  6. Step 6: Final answer
    x = 821.55

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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.