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Finding the Fourth Proportional to 640,112.15, 883,348.12 and 353,613.53

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Solution

The fourth proportional to 640,112.15, 883,348.12 and 353,613.53 is: 487,983.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,112.15 : 883,348.12 = 353,613.53 : x
  2. Step 2: Convert to fraction form
    640,112.15/883,348.12 = 353,613.53/x
  3. Step 3: Cross multiply
    640,112.15x = 883,348.12 × 353,613.53
  4. Step 4: Simplify right side
    640,112.15x = 312,363,846,932.06
  5. Step 5: Solve for x
    x = 312,363,846,932.06/640,112.15
  6. Step 6: Final answer
    x = 487,983.00

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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.