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Finding the Fourth Proportional to 1,284.37, 1,772.54 and 724.81

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Solution

The fourth proportional to 1,284.37, 1,772.54 and 724.81 is: 1,000.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.37 : 1,772.54 = 724.81 : x
  2. Step 2: Convert to fraction form
    1,284.37/1,772.54 = 724.81/x
  3. Step 3: Cross multiply
    1,284.37x = 1,772.54 × 724.81
  4. Step 4: Simplify right side
    1,284.37x = 1,284,754.72
  5. Step 5: Solve for x
    x = 1,284,754.72/1,284.37
  6. Step 6: Final answer
    x = 1,000.30

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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.