Home / 1,118.11-1,542.98-646.10

Finding the Fourth Proportional to 1,118.11, 1,542.98 and 646.10

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Solution

The fourth proportional to 1,118.11, 1,542.98 and 646.10 is: 891.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.11 : 1,542.98 = 646.10 : x
  2. Step 2: Convert to fraction form
    1,118.11/1,542.98 = 646.10/x
  3. Step 3: Cross multiply
    1,118.11x = 1,542.98 × 646.10
  4. Step 4: Simplify right side
    1,118.11x = 996,916.15
  5. Step 5: Solve for x
    x = 996,916.15/1,118.11
  6. Step 6: Final answer
    x = 891.61

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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.