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Finding the Fourth Proportional to 589.26, 887.18 and 428.07

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Solution

The fourth proportional to 589.26, 887.18 and 428.07 is: 644.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.26 : 887.18 = 428.07 : x
  2. Step 2: Convert to fraction form
    589.26/887.18 = 428.07/x
  3. Step 3: Cross multiply
    589.26x = 887.18 × 428.07
  4. Step 4: Simplify right side
    589.26x = 379,776.21
  5. Step 5: Solve for x
    x = 379,776.21/589.26
  6. Step 6: Final answer
    x = 644.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.