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Finding the Fourth Proportional to 640,287.32, 883,614.32 and 353,825.85

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Solution

The fourth proportional to 640,287.32, 883,614.32 and 353,825.85 is: 488,289.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,287.32 : 883,614.32 = 353,825.85 : x
  2. Step 2: Convert to fraction form
    640,287.32/883,614.32 = 353,825.85/x
  3. Step 3: Cross multiply
    640,287.32x = 883,614.32 × 353,825.85
  4. Step 4: Simplify right side
    640,287.32x = 312,645,590,717.44
  5. Step 5: Solve for x
    x = 312,645,590,717.44/640,287.32
  6. Step 6: Final answer
    x = 488,289.53

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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.