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Finding the Fourth Proportional to 1,413.47, 2,120.71 and 633.41

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Solution

The fourth proportional to 1,413.47, 2,120.71 and 633.41 is: 950.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.47 : 2,120.71 = 633.41 : x
  2. Step 2: Convert to fraction form
    1,413.47/2,120.71 = 633.41/x
  3. Step 3: Cross multiply
    1,413.47x = 2,120.71 × 633.41
  4. Step 4: Simplify right side
    1,413.47x = 1,343,278.92
  5. Step 5: Solve for x
    x = 1,343,278.92/1,413.47
  6. Step 6: Final answer
    x = 950.34

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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.