Home / 379,680.72-523,965.96-209,915.52

Finding the Fourth Proportional to 379,680.72, 523,965.96 and 209,915.52

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Solution

The fourth proportional to 379,680.72, 523,965.96 and 209,915.52 is: 289,687.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,680.72 : 523,965.96 = 209,915.52 : x
  2. Step 2: Convert to fraction form
    379,680.72/523,965.96 = 209,915.52/x
  3. Step 3: Cross multiply
    379,680.72x = 523,965.96 × 209,915.52
  4. Step 4: Simplify right side
    379,680.72x = 109,988,586,955.70
  5. Step 5: Solve for x
    x = 109,988,586,955.70/379,680.72
  6. Step 6: Final answer
    x = 289,687.05

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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.