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Finding the Fourth Proportional to 1,337.90, 2,006.11 and 413.20

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Solution

The fourth proportional to 1,337.90, 2,006.11 and 413.20 is: 619.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,337.90 : 2,006.11 = 413.20 : x
  2. Step 2: Convert to fraction form
    1,337.90/2,006.11 = 413.20/x
  3. Step 3: Cross multiply
    1,337.90x = 2,006.11 × 413.20
  4. Step 4: Simplify right side
    1,337.90x = 828,922.59
  5. Step 5: Solve for x
    x = 828,922.59/1,337.90
  6. Step 6: Final answer
    x = 619.57

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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.