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Finding the Fourth Proportional to 1,684.87, 2,325.10 and 938.79

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Solution

The fourth proportional to 1,684.87, 2,325.10 and 938.79 is: 1,295.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,684.87 : 2,325.10 = 938.79 : x
  2. Step 2: Convert to fraction form
    1,684.87/2,325.10 = 938.79/x
  3. Step 3: Cross multiply
    1,684.87x = 2,325.10 × 938.79
  4. Step 4: Simplify right side
    1,684.87x = 2,182,780.63
  5. Step 5: Solve for x
    x = 2,182,780.63/1,684.87
  6. Step 6: Final answer
    x = 1,295.52

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1.5x scale

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.