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Finding the Fourth Proportional to 1,917.79, 2,648.27 and 1,210.88

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Solution

The fourth proportional to 1,917.79, 2,648.27 and 1,210.88 is: 1,672.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.79 : 2,648.27 = 1,210.88 : x
  2. Step 2: Convert to fraction form
    1,917.79/2,648.27 = 1,210.88/x
  3. Step 3: Cross multiply
    1,917.79x = 2,648.27 × 1,210.88
  4. Step 4: Simplify right side
    1,917.79x = 3,206,737.18
  5. Step 5: Solve for x
    x = 3,206,737.18/1,917.79
  6. Step 6: Final answer
    x = 1,672.10

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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.