Home / 1,689.05-2,330.37-942.91

Finding the Fourth Proportional to 1,689.05, 2,330.37 and 942.91

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Solution

The fourth proportional to 1,689.05, 2,330.37 and 942.91 is: 1,300.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.05 : 2,330.37 = 942.91 : x
  2. Step 2: Convert to fraction form
    1,689.05/2,330.37 = 942.91/x
  3. Step 3: Cross multiply
    1,689.05x = 2,330.37 × 942.91
  4. Step 4: Simplify right side
    1,689.05x = 2,197,323.35
  5. Step 5: Solve for x
    x = 2,197,323.35/1,689.05
  6. Step 6: Final answer
    x = 1,300.92

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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.