Home / 1,424.10-2,136.60-693.75

Finding the Fourth Proportional to 1,424.10, 2,136.60 and 693.75

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Solution

The fourth proportional to 1,424.10, 2,136.60 and 693.75 is: 1,040.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.10 : 2,136.60 = 693.75 : x
  2. Step 2: Convert to fraction form
    1,424.10/2,136.60 = 693.75/x
  3. Step 3: Cross multiply
    1,424.10x = 2,136.60 × 693.75
  4. Step 4: Simplify right side
    1,424.10x = 1,482,266.25
  5. Step 5: Solve for x
    x = 1,482,266.25/1,424.10
  6. Step 6: Final answer
    x = 1,040.84

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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.