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Finding the Fourth Proportional to 644.67, 887.72 and 546.21

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Solution

The fourth proportional to 644.67, 887.72 and 546.21 is: 752.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.67 : 887.72 = 546.21 : x
  2. Step 2: Convert to fraction form
    644.67/887.72 = 546.21/x
  3. Step 3: Cross multiply
    644.67x = 887.72 × 546.21
  4. Step 4: Simplify right side
    644.67x = 484,878.81
  5. Step 5: Solve for x
    x = 484,878.81/644.67
  6. Step 6: Final answer
    x = 752.13

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.