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Finding the Fourth Proportional to 1,679.93, 2,318.25 and 971.76

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Solution

The fourth proportional to 1,679.93, 2,318.25 and 971.76 is: 1,340.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.93 : 2,318.25 = 971.76 : x
  2. Step 2: Convert to fraction form
    1,679.93/2,318.25 = 971.76/x
  3. Step 3: Cross multiply
    1,679.93x = 2,318.25 × 971.76
  4. Step 4: Simplify right side
    1,679.93x = 2,252,771.03
  5. Step 5: Solve for x
    x = 2,252,771.03/1,679.93
  6. Step 6: Final answer
    x = 1,340.99

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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.