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Finding the Fourth Proportional to 1,689.98, 2,332.08 and 943.79

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Solution

The fourth proportional to 1,689.98, 2,332.08 and 943.79 is: 1,302.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.98 : 2,332.08 = 943.79 : x
  2. Step 2: Convert to fraction form
    1,689.98/2,332.08 = 943.79/x
  3. Step 3: Cross multiply
    1,689.98x = 2,332.08 × 943.79
  4. Step 4: Simplify right side
    1,689.98x = 2,200,982.12
  5. Step 5: Solve for x
    x = 2,200,982.12/1,689.98
  6. Step 6: Final answer
    x = 1,302.38

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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.