Home / 1,211.04-1,671.30-687.06

Finding the Fourth Proportional to 1,211.04, 1,671.30 and 687.06

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Solution

The fourth proportional to 1,211.04, 1,671.30 and 687.06 is: 948.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.04 : 1,671.30 = 687.06 : x
  2. Step 2: Convert to fraction form
    1,211.04/1,671.30 = 687.06/x
  3. Step 3: Cross multiply
    1,211.04x = 1,671.30 × 687.06
  4. Step 4: Simplify right side
    1,211.04x = 1,148,283.38
  5. Step 5: Solve for x
    x = 1,148,283.38/1,211.04
  6. Step 6: Final answer
    x = 948.18

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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.