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Finding the Fourth Proportional to 2,154.30, 3,231.45 and 693.45

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Solution

The fourth proportional to 2,154.30, 3,231.45 and 693.45 is: 1,040.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.30 : 3,231.45 = 693.45 : x
  2. Step 2: Convert to fraction form
    2,154.30/3,231.45 = 693.45/x
  3. Step 3: Cross multiply
    2,154.30x = 3,231.45 × 693.45
  4. Step 4: Simplify right side
    2,154.30x = 2,240,849.00
  5. Step 5: Solve for x
    x = 2,240,849.00/2,154.30
  6. Step 6: Final answer
    x = 1,040.18

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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.