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Finding the Fourth Proportional to 640,153.72, 883,421.40 and 353,680.39

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Solution

The fourth proportional to 640,153.72, 883,421.40 and 353,680.39 is: 488,084.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,153.72 : 883,421.40 = 353,680.39 : x
  2. Step 2: Convert to fraction form
    640,153.72/883,421.40 = 353,680.39/x
  3. Step 3: Cross multiply
    640,153.72x = 883,421.40 × 353,680.39
  4. Step 4: Simplify right side
    640,153.72x = 312,448,825,286.35
  5. Step 5: Solve for x
    x = 312,448,825,286.35/640,153.72
  6. Step 6: Final answer
    x = 488,084.06

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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.