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Finding the Fourth Proportional to 1,611.52, 2,224.08 and 982.40

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Solution

The fourth proportional to 1,611.52, 2,224.08 and 982.40 is: 1,355.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.52 : 2,224.08 = 982.40 : x
  2. Step 2: Convert to fraction form
    1,611.52/2,224.08 = 982.40/x
  3. Step 3: Cross multiply
    1,611.52x = 2,224.08 × 982.40
  4. Step 4: Simplify right side
    1,611.52x = 2,184,936.19
  5. Step 5: Solve for x
    x = 2,184,936.19/1,611.52
  6. Step 6: Final answer
    x = 1,355.82

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1.5x scale

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.