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Finding the Fourth Proportional to 318,617.74, 439,631.76 and 203,808.46

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Solution

The fourth proportional to 318,617.74, 439,631.76 and 203,808.46 is: 281,216.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,617.74 : 439,631.76 = 203,808.46 : x
  2. Step 2: Convert to fraction form
    318,617.74/439,631.76 = 203,808.46/x
  3. Step 3: Cross multiply
    318,617.74x = 439,631.76 × 203,808.46
  4. Step 4: Simplify right side
    318,617.74x = 89,600,671,972.69
  5. Step 5: Solve for x
    x = 89,600,671,972.69/318,617.74
  6. Step 6: Final answer
    x = 281,216.83

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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.