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Finding the Fourth Proportional to 318,859.38, 440,056.99 and 238,146.76

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Solution

The fourth proportional to 318,859.38, 440,056.99 and 238,146.76 is: 328,665.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,859.38 : 440,056.99 = 238,146.76 : x
  2. Step 2: Convert to fraction form
    318,859.38/440,056.99 = 238,146.76/x
  3. Step 3: Cross multiply
    318,859.38x = 440,056.99 × 238,146.76
  4. Step 4: Simplify right side
    318,859.38x = 104,798,142,992.83
  5. Step 5: Solve for x
    x = 104,798,142,992.83/318,859.38
  6. Step 6: Final answer
    x = 328,665.71

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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.