Home / 2,915.90-4,375.20-1,530.80

Finding the Fourth Proportional to 2,915.90, 4,375.20 and 1,530.80

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Solution

The fourth proportional to 2,915.90, 4,375.20 and 1,530.80 is: 2,296.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.90 : 4,375.20 = 1,530.80 : x
  2. Step 2: Convert to fraction form
    2,915.90/4,375.20 = 1,530.80/x
  3. Step 3: Cross multiply
    2,915.90x = 4,375.20 × 1,530.80
  4. Step 4: Simplify right side
    2,915.90x = 6,697,556.16
  5. Step 5: Solve for x
    x = 6,697,556.16/2,915.90
  6. Step 6: Final answer
    x = 2,296.91

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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.