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Finding the Fourth Proportional to 1,594.68, 2,201.75 and 1,221

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Solution

The fourth proportional to 1,594.68, 2,201.75 and 1,221 is: 1,685.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,594.68 : 2,201.75 = 1,221 : x
  2. Step 2: Convert to fraction form
    1,594.68/2,201.75 = 1,221/x
  3. Step 3: Cross multiply
    1,594.68x = 2,201.75 × 1,221
  4. Step 4: Simplify right side
    1,594.68x = 2,688,336.75
  5. Step 5: Solve for x
    x = 2,688,336.75/1,594.68
  6. Step 6: Final answer
    x = 1,685.82

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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.