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Finding the Fourth Proportional to 2,392.96, 3,590.68 and 988.42

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Solution

The fourth proportional to 2,392.96, 3,590.68 and 988.42 is: 1,483.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,392.96 : 3,590.68 = 988.42 : x
  2. Step 2: Convert to fraction form
    2,392.96/3,590.68 = 988.42/x
  3. Step 3: Cross multiply
    2,392.96x = 3,590.68 × 988.42
  4. Step 4: Simplify right side
    2,392.96x = 3,549,099.93
  5. Step 5: Solve for x
    x = 3,549,099.93/2,392.96
  6. Step 6: Final answer
    x = 1,483.14

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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.