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Finding the Fourth Proportional to 309,998.28, 465,008.92 and 85,376.12

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Solution

The fourth proportional to 309,998.28, 465,008.92 and 85,376.12 is: 128,067.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,998.28 : 465,008.92 = 85,376.12 : x
  2. Step 2: Convert to fraction form
    309,998.28/465,008.92 = 85,376.12/x
  3. Step 3: Cross multiply
    309,998.28x = 465,008.92 × 85,376.12
  4. Step 4: Simplify right side
    309,998.28x = 39,700,657,354.99
  5. Step 5: Solve for x
    x = 39,700,657,354.99/309,998.28
  6. Step 6: Final answer
    x = 128,067.35

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1.5x scale

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.