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Finding the Fourth Proportional to 318,616.74, 439,630.38 and 203,807.46

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Solution

The fourth proportional to 318,616.74, 439,630.38 and 203,807.46 is: 281,215.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,616.74 : 439,630.38 = 203,807.46 : x
  2. Step 2: Convert to fraction form
    318,616.74/439,630.38 = 203,807.46/x
  3. Step 3: Cross multiply
    318,616.74x = 439,630.38 × 203,807.46
  4. Step 4: Simplify right side
    318,616.74x = 89,599,951,086.63
  5. Step 5: Solve for x
    x = 89,599,951,086.63/318,616.74
  6. Step 6: Final answer
    x = 281,215.45

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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.