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Finding the Fourth Proportional to 1,679.39, 2,519.07 and 947.45

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Solution

The fourth proportional to 1,679.39, 2,519.07 and 947.45 is: 1,421.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.39 : 2,519.07 = 947.45 : x
  2. Step 2: Convert to fraction form
    1,679.39/2,519.07 = 947.45/x
  3. Step 3: Cross multiply
    1,679.39x = 2,519.07 × 947.45
  4. Step 4: Simplify right side
    1,679.39x = 2,386,680.28
  5. Step 5: Solve for x
    x = 2,386,680.28/1,679.39
  6. Step 6: Final answer
    x = 1,421.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.