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Finding the Fourth Proportional to 2,829.84, 4,243.20 and 980.79

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Solution

The fourth proportional to 2,829.84, 4,243.20 and 980.79 is: 1,470.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,829.84 : 4,243.20 = 980.79 : x
  2. Step 2: Convert to fraction form
    2,829.84/4,243.20 = 980.79/x
  3. Step 3: Cross multiply
    2,829.84x = 4,243.20 × 980.79
  4. Step 4: Simplify right side
    2,829.84x = 4,161,666.91
  5. Step 5: Solve for x
    x = 4,161,666.91/2,829.84
  6. Step 6: Final answer
    x = 1,470.64

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1.5x scale

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.