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Finding the Fourth Proportional to 3,393.81, 5,090.71 and 928.65

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Solution

The fourth proportional to 3,393.81, 5,090.71 and 928.65 is: 1,392.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,393.81 : 5,090.71 = 928.65 : x
  2. Step 2: Convert to fraction form
    3,393.81/5,090.71 = 928.65/x
  3. Step 3: Cross multiply
    3,393.81x = 5,090.71 × 928.65
  4. Step 4: Simplify right side
    3,393.81x = 4,727,475.10
  5. Step 5: Solve for x
    x = 4,727,475.10/3,393.81
  6. Step 6: Final answer
    x = 1,392.97

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1.5x scale

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.