Home / 321,239.09-443,312.57-178,001.53

Finding the Fourth Proportional to 321,239.09, 443,312.57 and 178,001.53

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Solution

The fourth proportional to 321,239.09, 443,312.57 and 178,001.53 is: 245,643.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,239.09 : 443,312.57 = 178,001.53 : x
  2. Step 2: Convert to fraction form
    321,239.09/443,312.57 = 178,001.53/x
  3. Step 3: Cross multiply
    321,239.09x = 443,312.57 × 178,001.53
  4. Step 4: Simplify right side
    321,239.09x = 78,910,313,729.94
  5. Step 5: Solve for x
    x = 78,910,313,729.94/321,239.09
  6. Step 6: Final answer
    x = 245,643.56

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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.