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Finding the Fourth Proportional to 937.16, 1,405.91 and 389.38

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Solution

The fourth proportional to 937.16, 1,405.91 and 389.38 is: 584.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.16 : 1,405.91 = 389.38 : x
  2. Step 2: Convert to fraction form
    937.16/1,405.91 = 389.38/x
  3. Step 3: Cross multiply
    937.16x = 1,405.91 × 389.38
  4. Step 4: Simplify right side
    937.16x = 547,435.78
  5. Step 5: Solve for x
    x = 547,435.78/937.16
  6. Step 6: Final answer
    x = 584.14

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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.