Home / 1,679.34-2,317.32-981.12

Finding the Fourth Proportional to 1,679.34, 2,317.32 and 981.12

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Solution

The fourth proportional to 1,679.34, 2,317.32 and 981.12 is: 1,353.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.34 : 2,317.32 = 981.12 : x
  2. Step 2: Convert to fraction form
    1,679.34/2,317.32 = 981.12/x
  3. Step 3: Cross multiply
    1,679.34x = 2,317.32 × 981.12
  4. Step 4: Simplify right side
    1,679.34x = 2,273,569.00
  5. Step 5: Solve for x
    x = 2,273,569.00/1,679.34
  6. Step 6: Final answer
    x = 1,353.85

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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.