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Finding the Fourth Proportional to 3,240.99, 4,470.89 and 2,178.99

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Solution

The fourth proportional to 3,240.99, 4,470.89 and 2,178.99 is: 3,005.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,240.99 : 4,470.89 = 2,178.99 : x
  2. Step 2: Convert to fraction form
    3,240.99/4,470.89 = 2,178.99/x
  3. Step 3: Cross multiply
    3,240.99x = 4,470.89 × 2,178.99
  4. Step 4: Simplify right side
    3,240.99x = 9,742,013.71
  5. Step 5: Solve for x
    x = 9,742,013.71/3,240.99
  6. Step 6: Final answer
    x = 3,005.88

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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.