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Finding the Fourth Proportional to 2,372.40, 3,558.54 and 985.44

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Solution

The fourth proportional to 2,372.40, 3,558.54 and 985.44 is: 1,478.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,372.40 : 3,558.54 = 985.44 : x
  2. Step 2: Convert to fraction form
    2,372.40/3,558.54 = 985.44/x
  3. Step 3: Cross multiply
    2,372.40x = 3,558.54 × 985.44
  4. Step 4: Simplify right side
    2,372.40x = 3,506,727.66
  5. Step 5: Solve for x
    x = 3,506,727.66/2,372.40
  6. Step 6: Final answer
    x = 1,478.14

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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.