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Finding the Fourth Proportional to 629,742.64, 868,553.40 and 403,409.20

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Solution

The fourth proportional to 629,742.64, 868,553.40 and 403,409.20 is: 556,389.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,742.64 : 868,553.40 = 403,409.20 : x
  2. Step 2: Convert to fraction form
    629,742.64/868,553.40 = 403,409.20/x
  3. Step 3: Cross multiply
    629,742.64x = 868,553.40 × 403,409.20
  4. Step 4: Simplify right side
    629,742.64x = 350,382,432,251.28
  5. Step 5: Solve for x
    x = 350,382,432,251.28/629,742.64
  6. Step 6: Final answer
    x = 556,389.88

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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.