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Finding the Fourth Proportional to 321,719.67, 443,973.69 and 178,479.72

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Solution

The fourth proportional to 321,719.67, 443,973.69 and 178,479.72 is: 246,302.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,719.67 : 443,973.69 = 178,479.72 : x
  2. Step 2: Convert to fraction form
    321,719.67/443,973.69 = 178,479.72/x
  3. Step 3: Cross multiply
    321,719.67x = 443,973.69 × 178,479.72
  4. Step 4: Simplify right side
    321,719.67x = 79,240,299,878.57
  5. Step 5: Solve for x
    x = 79,240,299,878.57/321,719.67
  6. Step 6: Final answer
    x = 246,302.32

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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.