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Finding the Fourth Proportional to 1,413.90, 1,950.90 and 1,257.18

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Solution

The fourth proportional to 1,413.90, 1,950.90 and 1,257.18 is: 1,734.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.90 : 1,950.90 = 1,257.18 : x
  2. Step 2: Convert to fraction form
    1,413.90/1,950.90 = 1,257.18/x
  3. Step 3: Cross multiply
    1,413.90x = 1,950.90 × 1,257.18
  4. Step 4: Simplify right side
    1,413.90x = 2,452,632.46
  5. Step 5: Solve for x
    x = 2,452,632.46/1,413.90
  6. Step 6: Final answer
    x = 1,734.66

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1.5x scale

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.