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Finding the Fourth Proportional to 1,144.38, 1,715.54 and 413.45

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Solution

The fourth proportional to 1,144.38, 1,715.54 and 413.45 is: 619.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.38 : 1,715.54 = 413.45 : x
  2. Step 2: Convert to fraction form
    1,144.38/1,715.54 = 413.45/x
  3. Step 3: Cross multiply
    1,144.38x = 1,715.54 × 413.45
  4. Step 4: Simplify right side
    1,144.38x = 709,279.37
  5. Step 5: Solve for x
    x = 709,279.37/1,144.38
  6. Step 6: Final answer
    x = 619.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.