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Finding the Fourth Proportional to 415,343.40, 623,168.70 and 399,983.40

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Solution

The fourth proportional to 415,343.40, 623,168.70 and 399,983.40 is: 600,123.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,343.40 : 623,168.70 = 399,983.40 : x
  2. Step 2: Convert to fraction form
    415,343.40/623,168.70 = 399,983.40/x
  3. Step 3: Cross multiply
    415,343.40x = 623,168.70 × 399,983.40
  4. Step 4: Simplify right side
    415,343.40x = 249,257,135,399.58
  5. Step 5: Solve for x
    x = 249,257,135,399.58/415,343.40
  6. Step 6: Final answer
    x = 600,123.02

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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.