Home / 1,510.90-2,255.30-1,399.60

Finding the Fourth Proportional to 1,510.90, 2,255.30 and 1,399.60

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Solution

The fourth proportional to 1,510.90, 2,255.30 and 1,399.60 is: 2,089.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,510.90 : 2,255.30 = 1,399.60 : x
  2. Step 2: Convert to fraction form
    1,510.90/2,255.30 = 1,399.60/x
  3. Step 3: Cross multiply
    1,510.90x = 2,255.30 × 1,399.60
  4. Step 4: Simplify right side
    1,510.90x = 3,156,523.14
  5. Step 5: Solve for x
    x = 3,156,523.14/1,510.90
  6. Step 6: Final answer
    x = 2,089.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.