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Finding the Fourth Proportional to 1,413.96, 2,117.88 and 763.32

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Solution

The fourth proportional to 1,413.96, 2,117.88 and 763.32 is: 1,143.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.96 : 2,117.88 = 763.32 : x
  2. Step 2: Convert to fraction form
    1,413.96/2,117.88 = 763.32/x
  3. Step 3: Cross multiply
    1,413.96x = 2,117.88 × 763.32
  4. Step 4: Simplify right side
    1,413.96x = 1,616,620.16
  5. Step 5: Solve for x
    x = 1,616,620.16/1,413.96
  6. Step 6: Final answer
    x = 1,143.33

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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.