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Finding the Fourth Proportional to 386,693.94, 579,997.92 and 120,432.18

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Solution

The fourth proportional to 386,693.94, 579,997.92 and 120,432.18 is: 180,634.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,693.94 : 579,997.92 = 120,432.18 : x
  2. Step 2: Convert to fraction form
    386,693.94/579,997.92 = 120,432.18/x
  3. Step 3: Cross multiply
    386,693.94x = 579,997.92 × 120,432.18
  4. Step 4: Simplify right side
    386,693.94x = 69,850,413,901.07
  5. Step 5: Solve for x
    x = 69,850,413,901.07/386,693.94
  6. Step 6: Final answer
    x = 180,634.88

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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.