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Finding the Fourth Proportional to 838.22, 1,156.73 and 465.21

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Solution

The fourth proportional to 838.22, 1,156.73 and 465.21 is: 641.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.22 : 1,156.73 = 465.21 : x
  2. Step 2: Convert to fraction form
    838.22/1,156.73 = 465.21/x
  3. Step 3: Cross multiply
    838.22x = 1,156.73 × 465.21
  4. Step 4: Simplify right side
    838.22x = 538,120.04
  5. Step 5: Solve for x
    x = 538,120.04/838.22
  6. Step 6: Final answer
    x = 641.98

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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.