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Finding the Fourth Proportional to 2,377.92, 3,567.58 and 990.55

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Solution

The fourth proportional to 2,377.92, 3,567.58 and 990.55 is: 1,486.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,377.92 : 3,567.58 = 990.55 : x
  2. Step 2: Convert to fraction form
    2,377.92/3,567.58 = 990.55/x
  3. Step 3: Cross multiply
    2,377.92x = 3,567.58 × 990.55
  4. Step 4: Simplify right side
    2,377.92x = 3,533,848.28
  5. Step 5: Solve for x
    x = 3,533,848.28/2,377.92
  6. Step 6: Final answer
    x = 1,486.11

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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.