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Finding the Fourth Proportional to 1,120.53, 1,680.75 and 633.59

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Solution

The fourth proportional to 1,120.53, 1,680.75 and 633.59 is: 950.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.53 : 1,680.75 = 633.59 : x
  2. Step 2: Convert to fraction form
    1,120.53/1,680.75 = 633.59/x
  3. Step 3: Cross multiply
    1,120.53x = 1,680.75 × 633.59
  4. Step 4: Simplify right side
    1,120.53x = 1,064,904.29
  5. Step 5: Solve for x
    x = 1,064,904.29/1,120.53
  6. Step 6: Final answer
    x = 950.35

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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.