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Finding the Fourth Proportional to 1,931.92, 2,897.71 and 615.61

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Solution

The fourth proportional to 1,931.92, 2,897.71 and 615.61 is: 923.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.92 : 2,897.71 = 615.61 : x
  2. Step 2: Convert to fraction form
    1,931.92/2,897.71 = 615.61/x
  3. Step 3: Cross multiply
    1,931.92x = 2,897.71 × 615.61
  4. Step 4: Simplify right side
    1,931.92x = 1,783,871.66
  5. Step 5: Solve for x
    x = 1,783,871.66/1,931.92
  6. Step 6: Final answer
    x = 923.37

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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.