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Finding the Fourth Proportional to 935.02, 1,288.74 and 724.42

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Solution

The fourth proportional to 935.02, 1,288.74 and 724.42 is: 998.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.02 : 1,288.74 = 724.42 : x
  2. Step 2: Convert to fraction form
    935.02/1,288.74 = 724.42/x
  3. Step 3: Cross multiply
    935.02x = 1,288.74 × 724.42
  4. Step 4: Simplify right side
    935.02x = 933,589.03
  5. Step 5: Solve for x
    x = 933,589.03/935.02
  6. Step 6: Final answer
    x = 998.47

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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.