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Finding the Fourth Proportional to 1,573.18, 2,171 and 984.05

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Solution

The fourth proportional to 1,573.18, 2,171 and 984.05 is: 1,358.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,573.18 : 2,171 = 984.05 : x
  2. Step 2: Convert to fraction form
    1,573.18/2,171 = 984.05/x
  3. Step 3: Cross multiply
    1,573.18x = 2,171 × 984.05
  4. Step 4: Simplify right side
    1,573.18x = 2,136,372.55
  5. Step 5: Solve for x
    x = 2,136,372.55/1,573.18
  6. Step 6: Final answer
    x = 1,358.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.