Home / 1,690.14-2,332.22-981.85

Finding the Fourth Proportional to 1,690.14, 2,332.22 and 981.85

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Solution

The fourth proportional to 1,690.14, 2,332.22 and 981.85 is: 1,354.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.14 : 2,332.22 = 981.85 : x
  2. Step 2: Convert to fraction form
    1,690.14/2,332.22 = 981.85/x
  3. Step 3: Cross multiply
    1,690.14x = 2,332.22 × 981.85
  4. Step 4: Simplify right side
    1,690.14x = 2,289,879.47
  5. Step 5: Solve for x
    x = 2,289,879.47/1,690.14
  6. Step 6: Final answer
    x = 1,354.85

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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.