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Finding the Fourth Proportional to 1,113.02, 1,669.85 and 940.11

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Solution

The fourth proportional to 1,113.02, 1,669.85 and 940.11 is: 1,410.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.02 : 1,669.85 = 940.11 : x
  2. Step 2: Convert to fraction form
    1,113.02/1,669.85 = 940.11/x
  3. Step 3: Cross multiply
    1,113.02x = 1,669.85 × 940.11
  4. Step 4: Simplify right side
    1,113.02x = 1,569,842.68
  5. Step 5: Solve for x
    x = 1,569,842.68/1,113.02
  6. Step 6: Final answer
    x = 1,410.44

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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.