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Finding the Fourth Proportional to 762.76, 1,052.61 and 413.45

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Solution

The fourth proportional to 762.76, 1,052.61 and 413.45 is: 570.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.76 : 1,052.61 = 413.45 : x
  2. Step 2: Convert to fraction form
    762.76/1,052.61 = 413.45/x
  3. Step 3: Cross multiply
    762.76x = 1,052.61 × 413.45
  4. Step 4: Simplify right side
    762.76x = 435,201.60
  5. Step 5: Solve for x
    x = 435,201.60/762.76
  6. Step 6: Final answer
    x = 570.56

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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.