Home / 1,413.08-2,117.47-718.71

Finding the Fourth Proportional to 1,413.08, 2,117.47 and 718.71

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Solution

The fourth proportional to 1,413.08, 2,117.47 and 718.71 is: 1,076.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.08 : 2,117.47 = 718.71 : x
  2. Step 2: Convert to fraction form
    1,413.08/2,117.47 = 718.71/x
  3. Step 3: Cross multiply
    1,413.08x = 2,117.47 × 718.71
  4. Step 4: Simplify right side
    1,413.08x = 1,521,842.44
  5. Step 5: Solve for x
    x = 1,521,842.44/1,413.08
  6. Step 6: Final answer
    x = 1,076.97

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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.