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Finding the Fourth Proportional to 938.63, 1,295.91 and 589.92

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Solution

The fourth proportional to 938.63, 1,295.91 and 589.92 is: 814.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.63 : 1,295.91 = 589.92 : x
  2. Step 2: Convert to fraction form
    938.63/1,295.91 = 589.92/x
  3. Step 3: Cross multiply
    938.63x = 1,295.91 × 589.92
  4. Step 4: Simplify right side
    938.63x = 764,483.23
  5. Step 5: Solve for x
    x = 764,483.23/938.63
  6. Step 6: Final answer
    x = 814.47

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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.