Home / 1,425.15-2,136.90-693.99

Finding the Fourth Proportional to 1,425.15, 2,136.90 and 693.99

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Solution

The fourth proportional to 1,425.15, 2,136.90 and 693.99 is: 1,040.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.15 : 2,136.90 = 693.99 : x
  2. Step 2: Convert to fraction form
    1,425.15/2,136.90 = 693.99/x
  3. Step 3: Cross multiply
    1,425.15x = 2,136.90 × 693.99
  4. Step 4: Simplify right side
    1,425.15x = 1,482,987.23
  5. Step 5: Solve for x
    x = 1,482,987.23/1,425.15
  6. Step 6: Final answer
    x = 1,040.58

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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.