Home / 2,140.19-3,211.28-907.89

Finding the Fourth Proportional to 2,140.19, 3,211.28 and 907.89

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Solution

The fourth proportional to 2,140.19, 3,211.28 and 907.89 is: 1,362.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.19 : 3,211.28 = 907.89 : x
  2. Step 2: Convert to fraction form
    2,140.19/3,211.28 = 907.89/x
  3. Step 3: Cross multiply
    2,140.19x = 3,211.28 × 907.89
  4. Step 4: Simplify right side
    2,140.19x = 2,915,484.46
  5. Step 5: Solve for x
    x = 2,915,484.46/2,140.19
  6. Step 6: Final answer
    x = 1,362.26

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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.