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Finding the Fourth Proportional to 398,640.28, 550,127.92 and 217,350.76

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Solution

The fourth proportional to 398,640.28, 550,127.92 and 217,350.76 is: 299,946.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,640.28 : 550,127.92 = 217,350.76 : x
  2. Step 2: Convert to fraction form
    398,640.28/550,127.92 = 217,350.76/x
  3. Step 3: Cross multiply
    398,640.28x = 550,127.92 × 217,350.76
  4. Step 4: Simplify right side
    398,640.28x = 119,570,721,509.22
  5. Step 5: Solve for x
    x = 119,570,721,509.22/398,640.28
  6. Step 6: Final answer
    x = 299,946.41

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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.