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Finding the Fourth Proportional to 3,320.88, 4,980.15 and 980.27

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Solution

The fourth proportional to 3,320.88, 4,980.15 and 980.27 is: 1,470.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,320.88 : 4,980.15 = 980.27 : x
  2. Step 2: Convert to fraction form
    3,320.88/4,980.15 = 980.27/x
  3. Step 3: Cross multiply
    3,320.88x = 4,980.15 × 980.27
  4. Step 4: Simplify right side
    3,320.88x = 4,881,866.74
  5. Step 5: Solve for x
    x = 4,881,866.74/3,320.88
  6. Step 6: Final answer
    x = 1,470.05

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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.