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Finding the Fourth Proportional to 1,413.35, 1,951.19 and 971.90

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Solution

The fourth proportional to 1,413.35, 1,951.19 and 971.90 is: 1,341.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.35 : 1,951.19 = 971.90 : x
  2. Step 2: Convert to fraction form
    1,413.35/1,951.19 = 971.90/x
  3. Step 3: Cross multiply
    1,413.35x = 1,951.19 × 971.90
  4. Step 4: Simplify right side
    1,413.35x = 1,896,346.95
  5. Step 5: Solve for x
    x = 1,896,346.95/1,413.35
  6. Step 6: Final answer
    x = 1,341.74

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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.