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Finding the Fourth Proportional to 312,542.02, 431,299.10 and 183,478.42

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Solution

The fourth proportional to 312,542.02, 431,299.10 and 183,478.42 is: 253,195.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,542.02 : 431,299.10 = 183,478.42 : x
  2. Step 2: Convert to fraction form
    312,542.02/431,299.10 = 183,478.42/x
  3. Step 3: Cross multiply
    312,542.02x = 431,299.10 × 183,478.42
  4. Step 4: Simplify right side
    312,542.02x = 79,134,077,415.42
  5. Step 5: Solve for x
    x = 79,134,077,415.42/312,542.02
  6. Step 6: Final answer
    x = 253,195.00

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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.