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Finding the Fourth Proportional to 2,153.99, 3,231.16 and 693.19

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Solution

The fourth proportional to 2,153.99, 3,231.16 and 693.19 is: 1,039.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.99 : 3,231.16 = 693.19 : x
  2. Step 2: Convert to fraction form
    2,153.99/3,231.16 = 693.19/x
  3. Step 3: Cross multiply
    2,153.99x = 3,231.16 × 693.19
  4. Step 4: Simplify right side
    2,153.99x = 2,239,810.11
  5. Step 5: Solve for x
    x = 2,239,810.11/2,153.99
  6. Step 6: Final answer
    x = 1,039.84

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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.