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Finding the Fourth Proportional to 318,983.84, 440,380.97 and 211,699.34

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Solution

The fourth proportional to 318,983.84, 440,380.97 and 211,699.34 is: 292,266.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,983.84 : 440,380.97 = 211,699.34 : x
  2. Step 2: Convert to fraction form
    318,983.84/440,380.97 = 211,699.34/x
  3. Step 3: Cross multiply
    318,983.84x = 440,380.97 × 211,699.34
  4. Step 4: Simplify right side
    318,983.84x = 93,228,357,437.16
  5. Step 5: Solve for x
    x = 93,228,357,437.16/318,983.84
  6. Step 6: Final answer
    x = 292,266.71

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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.