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Finding the Fourth Proportional to 634.38, 947.39 and 547.89

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Solution

The fourth proportional to 634.38, 947.39 and 547.89 is: 818.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.38 : 947.39 = 547.89 : x
  2. Step 2: Convert to fraction form
    634.38/947.39 = 547.89/x
  3. Step 3: Cross multiply
    634.38x = 947.39 × 547.89
  4. Step 4: Simplify right side
    634.38x = 519,065.51
  5. Step 5: Solve for x
    x = 519,065.51/634.38
  6. Step 6: Final answer
    x = 818.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.