Home / 1,689.66-2,330.58-1,358.85

Finding the Fourth Proportional to 1,689.66, 2,330.58 and 1,358.85

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Solution

The fourth proportional to 1,689.66, 2,330.58 and 1,358.85 is: 1,874.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.66 : 2,330.58 = 1,358.85 : x
  2. Step 2: Convert to fraction form
    1,689.66/2,330.58 = 1,358.85/x
  3. Step 3: Cross multiply
    1,689.66x = 2,330.58 × 1,358.85
  4. Step 4: Simplify right side
    1,689.66x = 3,166,908.63
  5. Step 5: Solve for x
    x = 3,166,908.63/1,689.66
  6. Step 6: Final answer
    x = 1,874.29

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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.