Home / 1,270.14-1,905.27-620.87

Finding the Fourth Proportional to 1,270.14, 1,905.27 and 620.87

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Solution

The fourth proportional to 1,270.14, 1,905.27 and 620.87 is: 931.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.14 : 1,905.27 = 620.87 : x
  2. Step 2: Convert to fraction form
    1,270.14/1,905.27 = 620.87/x
  3. Step 3: Cross multiply
    1,270.14x = 1,905.27 × 620.87
  4. Step 4: Simplify right side
    1,270.14x = 1,182,915.46
  5. Step 5: Solve for x
    x = 1,182,915.46/1,270.14
  6. Step 6: Final answer
    x = 931.33

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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.