Home / 1,211.50-1,807.19-1,171.01

Finding the Fourth Proportional to 1,211.50, 1,807.19 and 1,171.01

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Solution

The fourth proportional to 1,211.50, 1,807.19 and 1,171.01 is: 1,746.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.50 : 1,807.19 = 1,171.01 : x
  2. Step 2: Convert to fraction form
    1,211.50/1,807.19 = 1,171.01/x
  3. Step 3: Cross multiply
    1,211.50x = 1,807.19 × 1,171.01
  4. Step 4: Simplify right side
    1,211.50x = 2,116,228.53
  5. Step 5: Solve for x
    x = 2,116,228.53/1,211.50
  6. Step 6: Final answer
    x = 1,746.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.