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Finding the Fourth Proportional to 2,122.96, 3,184.64 and 890.20

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Solution

The fourth proportional to 2,122.96, 3,184.64 and 890.20 is: 1,335.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.96 : 3,184.64 = 890.20 : x
  2. Step 2: Convert to fraction form
    2,122.96/3,184.64 = 890.20/x
  3. Step 3: Cross multiply
    2,122.96x = 3,184.64 × 890.20
  4. Step 4: Simplify right side
    2,122.96x = 2,834,966.53
  5. Step 5: Solve for x
    x = 2,834,966.53/2,122.96
  6. Step 6: Final answer
    x = 1,335.38

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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.