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Finding the Fourth Proportional to 2,193.68, 3,290.52 and 654.56

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Solution

The fourth proportional to 2,193.68, 3,290.52 and 654.56 is: 981.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,193.68 : 3,290.52 = 654.56 : x
  2. Step 2: Convert to fraction form
    2,193.68/3,290.52 = 654.56/x
  3. Step 3: Cross multiply
    2,193.68x = 3,290.52 × 654.56
  4. Step 4: Simplify right side
    2,193.68x = 2,153,842.77
  5. Step 5: Solve for x
    x = 2,153,842.77/2,193.68
  6. Step 6: Final answer
    x = 981.84

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Double scale
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Similar ratio
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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.