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Finding the Fourth Proportional to 572, 789.90 and 551.48

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Solution

The fourth proportional to 572, 789.90 and 551.48 is: 761.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    572 : 789.90 = 551.48 : x
  2. Step 2: Convert to fraction form
    572/789.90 = 551.48/x
  3. Step 3: Cross multiply
    572x = 789.90 × 551.48
  4. Step 4: Simplify right side
    572x = 435,614.05
  5. Step 5: Solve for x
    x = 435,614.05/572
  6. Step 6: Final answer
    x = 761.56

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Why These Related Problems?

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