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Finding the Fourth Proportional to 887.37, 1,330.97 and 393.79

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Solution

The fourth proportional to 887.37, 1,330.97 and 393.79 is: 590.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.37 : 1,330.97 = 393.79 : x
  2. Step 2: Convert to fraction form
    887.37/1,330.97 = 393.79/x
  3. Step 3: Cross multiply
    887.37x = 1,330.97 × 393.79
  4. Step 4: Simplify right side
    887.37x = 524,118.65
  5. Step 5: Solve for x
    x = 524,118.65/887.37
  6. Step 6: Final answer
    x = 590.64

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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.