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Finding the Fourth Proportional to 1,686.89, 2,328.02 and 940.85

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Solution

The fourth proportional to 1,686.89, 2,328.02 and 940.85 is: 1,298.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.89 : 2,328.02 = 940.85 : x
  2. Step 2: Convert to fraction form
    1,686.89/2,328.02 = 940.85/x
  3. Step 3: Cross multiply
    1,686.89x = 2,328.02 × 940.85
  4. Step 4: Simplify right side
    1,686.89x = 2,190,301.27
  5. Step 5: Solve for x
    x = 2,190,301.27/1,686.89
  6. Step 6: Final answer
    x = 1,298.43

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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.