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Finding the Fourth Proportional to 640,400.32, 883,753.85 and 350,016.53

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Solution

The fourth proportional to 640,400.32, 883,753.85 and 350,016.53 is: 483,023.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,400.32 : 883,753.85 = 350,016.53 : x
  2. Step 2: Convert to fraction form
    640,400.32/883,753.85 = 350,016.53/x
  3. Step 3: Cross multiply
    640,400.32x = 883,753.85 × 350,016.53
  4. Step 4: Simplify right side
    640,400.32x = 309,328,455,951.14
  5. Step 5: Solve for x
    x = 309,328,455,951.14/640,400.32
  6. Step 6: Final answer
    x = 483,023.58

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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.