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Finding the Fourth Proportional to 3,720.99, 5,580.64 and 1,087.95

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Solution

The fourth proportional to 3,720.99, 5,580.64 and 1,087.95 is: 1,631.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.99 : 5,580.64 = 1,087.95 : x
  2. Step 2: Convert to fraction form
    3,720.99/5,580.64 = 1,087.95/x
  3. Step 3: Cross multiply
    3,720.99x = 5,580.64 × 1,087.95
  4. Step 4: Simplify right side
    3,720.99x = 6,071,457.29
  5. Step 5: Solve for x
    x = 6,071,457.29/3,720.99
  6. Step 6: Final answer
    x = 1,631.68

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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.