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Finding the Fourth Proportional to 808.68, 1,117.22 and 622.92

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Solution

The fourth proportional to 808.68, 1,117.22 and 622.92 is: 860.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.68 : 1,117.22 = 622.92 : x
  2. Step 2: Convert to fraction form
    808.68/1,117.22 = 622.92/x
  3. Step 3: Cross multiply
    808.68x = 1,117.22 × 622.92
  4. Step 4: Simplify right side
    808.68x = 695,935.57
  5. Step 5: Solve for x
    x = 695,935.57/808.68
  6. Step 6: Final answer
    x = 860.58

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1.5x scale

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.