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Finding the Fourth Proportional to 399,082.80, 598,915.80 and 280,984.80

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Solution

The fourth proportional to 399,082.80, 598,915.80 and 280,984.80 is: 421,682.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,082.80 : 598,915.80 = 280,984.80 : x
  2. Step 2: Convert to fraction form
    399,082.80/598,915.80 = 280,984.80/x
  3. Step 3: Cross multiply
    399,082.80x = 598,915.80 × 280,984.80
  4. Step 4: Simplify right side
    399,082.80x = 168,286,236,279.84
  5. Step 5: Solve for x
    x = 168,286,236,279.84/399,082.80
  6. Step 6: Final answer
    x = 421,682.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.