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Finding the Fourth Proportional to 2,278.86, 3,417.67 and 980.02

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Solution

The fourth proportional to 2,278.86, 3,417.67 and 980.02 is: 1,469.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.86 : 3,417.67 = 980.02 : x
  2. Step 2: Convert to fraction form
    2,278.86/3,417.67 = 980.02/x
  3. Step 3: Cross multiply
    2,278.86x = 3,417.67 × 980.02
  4. Step 4: Simplify right side
    2,278.86x = 3,349,384.95
  5. Step 5: Solve for x
    x = 3,349,384.95/2,278.86
  6. Step 6: Final answer
    x = 1,469.76

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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.