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Finding the Fourth Proportional to 398,726.92, 550,243.26 and 217,434.18

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Solution

The fourth proportional to 398,726.92, 550,243.26 and 217,434.18 is: 300,059.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,726.92 : 550,243.26 = 217,434.18 : x
  2. Step 2: Convert to fraction form
    398,726.92/550,243.26 = 217,434.18/x
  3. Step 3: Cross multiply
    398,726.92x = 550,243.26 × 217,434.18
  4. Step 4: Simplify right side
    398,726.92x = 119,641,692,038.63
  5. Step 5: Solve for x
    x = 119,641,692,038.63/398,726.92
  6. Step 6: Final answer
    x = 300,059.23

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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.