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Finding the Fourth Proportional to 640,309.80, 883,627.85 and 353,829.90

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Solution

The fourth proportional to 640,309.80, 883,627.85 and 353,829.90 is: 488,285.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,309.80 : 883,627.85 = 353,829.90 : x
  2. Step 2: Convert to fraction form
    640,309.80/883,627.85 = 353,829.90/x
  3. Step 3: Cross multiply
    640,309.80x = 883,627.85 × 353,829.90
  4. Step 4: Simplify right side
    640,309.80x = 312,653,952,033.57
  5. Step 5: Solve for x
    x = 312,653,952,033.57/640,309.80
  6. Step 6: Final answer
    x = 488,285.44

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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.