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Finding the Fourth Proportional to 640,156.72, 883,425.54 and 353,683.40

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Solution

The fourth proportional to 640,156.72, 883,425.54 and 353,683.40 is: 488,088.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,156.72 : 883,425.54 = 353,683.40 : x
  2. Step 2: Convert to fraction form
    640,156.72/883,425.54 = 353,683.40/x
  3. Step 3: Cross multiply
    640,156.72x = 883,425.54 × 353,683.40
  4. Step 4: Simplify right side
    640,156.72x = 312,452,948,634.04
  5. Step 5: Solve for x
    x = 312,452,948,634.04/640,156.72
  6. Step 6: Final answer
    x = 488,088.21

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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.