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Finding the Fourth Proportional to 3,328.89, 4,992.48 and 988.35

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Solution

The fourth proportional to 3,328.89, 4,992.48 and 988.35 is: 1,482.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,328.89 : 4,992.48 = 988.35 : x
  2. Step 2: Convert to fraction form
    3,328.89/4,992.48 = 988.35/x
  3. Step 3: Cross multiply
    3,328.89x = 4,992.48 × 988.35
  4. Step 4: Simplify right side
    3,328.89x = 4,934,317.61
  5. Step 5: Solve for x
    x = 4,934,317.61/3,328.89
  6. Step 6: Final answer
    x = 1,482.27

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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.