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Finding the Fourth Proportional to 3,762.08, 5,642.56 and 988.80

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Solution

The fourth proportional to 3,762.08, 5,642.56 and 988.80 is: 1,483.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,762.08 : 5,642.56 = 988.80 : x
  2. Step 2: Convert to fraction form
    3,762.08/5,642.56 = 988.80/x
  3. Step 3: Cross multiply
    3,762.08x = 5,642.56 × 988.80
  4. Step 4: Simplify right side
    3,762.08x = 5,579,363.33
  5. Step 5: Solve for x
    x = 5,579,363.33/3,762.08
  6. Step 6: Final answer
    x = 1,483.05

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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.