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Finding the Fourth Proportional to 318,215.84, 439,149.15 and 174,986.78

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Solution

The fourth proportional to 318,215.84, 439,149.15 and 174,986.78 is: 241,487.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,215.84 : 439,149.15 = 174,986.78 : x
  2. Step 2: Convert to fraction form
    318,215.84/439,149.15 = 174,986.78/x
  3. Step 3: Cross multiply
    318,215.84x = 439,149.15 × 174,986.78
  4. Step 4: Simplify right side
    318,215.84x = 76,845,293,502.49
  5. Step 5: Solve for x
    x = 76,845,293,502.49/318,215.84
  6. Step 6: Final answer
    x = 241,487.96

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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.