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Finding the Fourth Proportional to 641.02, 953.29 and 620.52

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Solution

The fourth proportional to 641.02, 953.29 and 620.52 is: 922.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.02 : 953.29 = 620.52 : x
  2. Step 2: Convert to fraction form
    641.02/953.29 = 620.52/x
  3. Step 3: Cross multiply
    641.02x = 953.29 × 620.52
  4. Step 4: Simplify right side
    641.02x = 591,535.51
  5. Step 5: Solve for x
    x = 591,535.51/641.02
  6. Step 6: Final answer
    x = 922.80

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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.