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Finding the Fourth Proportional to 910.02, 1,364.76 and 422.58

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Solution

The fourth proportional to 910.02, 1,364.76 and 422.58 is: 633.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.02 : 1,364.76 = 422.58 : x
  2. Step 2: Convert to fraction form
    910.02/1,364.76 = 422.58/x
  3. Step 3: Cross multiply
    910.02x = 1,364.76 × 422.58
  4. Step 4: Simplify right side
    910.02x = 576,720.28
  5. Step 5: Solve for x
    x = 576,720.28/910.02
  6. Step 6: Final answer
    x = 633.74

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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.