Home / 2,148.16-3,222.41-915.58

Finding the Fourth Proportional to 2,148.16, 3,222.41 and 915.58

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Solution

The fourth proportional to 2,148.16, 3,222.41 and 915.58 is: 1,373.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.16 : 3,222.41 = 915.58 : x
  2. Step 2: Convert to fraction form
    2,148.16/3,222.41 = 915.58/x
  3. Step 3: Cross multiply
    2,148.16x = 3,222.41 × 915.58
  4. Step 4: Simplify right side
    2,148.16x = 2,950,367.11
  5. Step 5: Solve for x
    x = 2,950,367.11/2,148.16
  6. Step 6: Final answer
    x = 1,373.44

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1.5x scale

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.