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Finding the Fourth Proportional to 1,881.16, 2,819.97 and 647.71

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Solution

The fourth proportional to 1,881.16, 2,819.97 and 647.71 is: 970.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,881.16 : 2,819.97 = 647.71 : x
  2. Step 2: Convert to fraction form
    1,881.16/2,819.97 = 647.71/x
  3. Step 3: Cross multiply
    1,881.16x = 2,819.97 × 647.71
  4. Step 4: Simplify right side
    1,881.16x = 1,826,522.77
  5. Step 5: Solve for x
    x = 1,826,522.77/1,881.16
  6. Step 6: Final answer
    x = 970.96

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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.