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Finding the Fourth Proportional to 740.15, 1,021.89 and 571.79

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Solution

The fourth proportional to 740.15, 1,021.89 and 571.79 is: 789.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.15 : 1,021.89 = 571.79 : x
  2. Step 2: Convert to fraction form
    740.15/1,021.89 = 571.79/x
  3. Step 3: Cross multiply
    740.15x = 1,021.89 × 571.79
  4. Step 4: Simplify right side
    740.15x = 584,306.48
  5. Step 5: Solve for x
    x = 584,306.48/740.15
  6. Step 6: Final answer
    x = 789.44

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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.