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Finding the Fourth Proportional to 508,471.81, 701,689.12 and 279,032.92

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Solution

The fourth proportional to 508,471.81, 701,689.12 and 279,032.92 is: 385,064.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,471.81 : 701,689.12 = 279,032.92 : x
  2. Step 2: Convert to fraction form
    508,471.81/701,689.12 = 279,032.92/x
  3. Step 3: Cross multiply
    508,471.81x = 701,689.12 × 279,032.92
  4. Step 4: Simplify right side
    508,471.81x = 195,794,361,634.03
  5. Step 5: Solve for x
    x = 195,794,361,634.03/508,471.81
  6. Step 6: Final answer
    x = 385,064.34

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Double scale
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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.