Home / 1,578.21-2,177.94-915.46

Finding the Fourth Proportional to 1,578.21, 2,177.94 and 915.46

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Solution

The fourth proportional to 1,578.21, 2,177.94 and 915.46 is: 1,263.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.21 : 2,177.94 = 915.46 : x
  2. Step 2: Convert to fraction form
    1,578.21/2,177.94 = 915.46/x
  3. Step 3: Cross multiply
    1,578.21x = 2,177.94 × 915.46
  4. Step 4: Simplify right side
    1,578.21x = 1,993,801.49
  5. Step 5: Solve for x
    x = 1,993,801.49/1,578.21
  6. Step 6: Final answer
    x = 1,263.33

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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.