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Finding the Fourth Proportional to 887.07, 1,330.15 and 399.71

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Solution

The fourth proportional to 887.07, 1,330.15 and 399.71 is: 599.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.07 : 1,330.15 = 399.71 : x
  2. Step 2: Convert to fraction form
    887.07/1,330.15 = 399.71/x
  3. Step 3: Cross multiply
    887.07x = 1,330.15 × 399.71
  4. Step 4: Simplify right side
    887.07x = 531,674.26
  5. Step 5: Solve for x
    x = 531,674.26/887.07
  6. Step 6: Final answer
    x = 599.36

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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.