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Finding the Fourth Proportional to 279,478.71, 384,826.41 and 210,668.13

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Solution

The fourth proportional to 279,478.71, 384,826.41 and 210,668.13 is: 290,078.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,478.71 : 384,826.41 = 210,668.13 : x
  2. Step 2: Convert to fraction form
    279,478.71/384,826.41 = 210,668.13/x
  3. Step 3: Cross multiply
    279,478.71x = 384,826.41 × 210,668.13
  4. Step 4: Simplify right side
    279,478.71x = 81,070,660,169.31
  5. Step 5: Solve for x
    x = 81,070,660,169.31/279,478.71
  6. Step 6: Final answer
    x = 290,078.12

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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.