Home / 1,690.06-2,332.30-981.94

Finding the Fourth Proportional to 1,690.06, 2,332.30 and 981.94

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Solution

The fourth proportional to 1,690.06, 2,332.30 and 981.94 is: 1,355.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.06 : 2,332.30 = 981.94 : x
  2. Step 2: Convert to fraction form
    1,690.06/2,332.30 = 981.94/x
  3. Step 3: Cross multiply
    1,690.06x = 2,332.30 × 981.94
  4. Step 4: Simplify right side
    1,690.06x = 2,290,178.66
  5. Step 5: Solve for x
    x = 2,290,178.66/1,690.06
  6. Step 6: Final answer
    x = 1,355.09

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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.