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Finding the Fourth Proportional to 393,676, 543,302.08 and 223,964.80

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Solution

The fourth proportional to 393,676, 543,302.08 and 223,964.80 is: 309,088.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,676 : 543,302.08 = 223,964.80 : x
  2. Step 2: Convert to fraction form
    393,676/543,302.08 = 223,964.80/x
  3. Step 3: Cross multiply
    393,676x = 543,302.08 × 223,964.80
  4. Step 4: Simplify right side
    393,676x = 121,680,541,686.78
  5. Step 5: Solve for x
    x = 121,680,541,686.78/393,676
  6. Step 6: Final answer
    x = 309,088.04

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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.