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Finding the Fourth Proportional to 1,033.56, 1,426.95 and 660.69

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Solution

The fourth proportional to 1,033.56, 1,426.95 and 660.69 is: 912.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,033.56 : 1,426.95 = 660.69 : x
  2. Step 2: Convert to fraction form
    1,033.56/1,426.95 = 660.69/x
  3. Step 3: Cross multiply
    1,033.56x = 1,426.95 × 660.69
  4. Step 4: Simplify right side
    1,033.56x = 942,771.60
  5. Step 5: Solve for x
    x = 942,771.60/1,033.56
  6. Step 6: Final answer
    x = 912.16

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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.