Home / 491,531.42-678,423.99-321,667.13

Finding the Fourth Proportional to 491,531.42, 678,423.99 and 321,667.13

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Solution

The fourth proportional to 491,531.42, 678,423.99 and 321,667.13 is: 443,973.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,531.42 : 678,423.99 = 321,667.13 : x
  2. Step 2: Convert to fraction form
    491,531.42/678,423.99 = 321,667.13/x
  3. Step 3: Cross multiply
    491,531.42x = 678,423.99 × 321,667.13
  4. Step 4: Simplify right side
    491,531.42x = 218,226,697,786.45
  5. Step 5: Solve for x
    x = 218,226,697,786.45/491,531.42
  6. Step 6: Final answer
    x = 443,973.04

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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.