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Finding the Fourth Proportional to 640,090.90, 883,250.13 and 353,593.90

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Solution

The fourth proportional to 640,090.90, 883,250.13 and 353,593.90 is: 487,917.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,090.90 : 883,250.13 = 353,593.90 : x
  2. Step 2: Convert to fraction form
    640,090.90/883,250.13 = 353,593.90/x
  3. Step 3: Cross multiply
    640,090.90x = 883,250.13 × 353,593.90
  4. Step 4: Simplify right side
    640,090.90x = 312,311,858,335.69
  5. Step 5: Solve for x
    x = 312,311,858,335.69/640,090.90
  6. Step 6: Final answer
    x = 487,917.98

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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.