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Finding the Fourth Proportional to 1,068.75, 1,474.89 and 654.75

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Solution

The fourth proportional to 1,068.75, 1,474.89 and 654.75 is: 903.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,068.75 : 1,474.89 = 654.75 : x
  2. Step 2: Convert to fraction form
    1,068.75/1,474.89 = 654.75/x
  3. Step 3: Cross multiply
    1,068.75x = 1,474.89 × 654.75
  4. Step 4: Simplify right side
    1,068.75x = 965,684.23
  5. Step 5: Solve for x
    x = 965,684.23/1,068.75
  6. Step 6: Final answer
    x = 903.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.