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Finding the Fourth Proportional to 1,656.84, 2,479.85 and 1,217.97

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Solution

The fourth proportional to 1,656.84, 2,479.85 and 1,217.97 is: 1,822.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,656.84 : 2,479.85 = 1,217.97 : x
  2. Step 2: Convert to fraction form
    1,656.84/2,479.85 = 1,217.97/x
  3. Step 3: Cross multiply
    1,656.84x = 2,479.85 × 1,217.97
  4. Step 4: Simplify right side
    1,656.84x = 3,020,376.81
  5. Step 5: Solve for x
    x = 3,020,376.81/1,656.84
  6. Step 6: Final answer
    x = 1,822.98

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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.