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Finding the Fourth Proportional to 429,088.80, 643,438.80 and 162,760.80

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Solution

The fourth proportional to 429,088.80, 643,438.80 and 162,760.80 is: 244,067.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,088.80 : 643,438.80 = 162,760.80 : x
  2. Step 2: Convert to fraction form
    429,088.80/643,438.80 = 162,760.80/x
  3. Step 3: Cross multiply
    429,088.80x = 643,438.80 × 162,760.80
  4. Step 4: Simplify right side
    429,088.80x = 104,726,613,839.04
  5. Step 5: Solve for x
    x = 104,726,613,839.04/429,088.80
  6. Step 6: Final answer
    x = 244,067.46

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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.