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Finding the Fourth Proportional to 640,939.85, 884,460.97 and 350,493.76

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Solution

The fourth proportional to 640,939.85, 884,460.97 and 350,493.76 is: 483,661.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,939.85 : 884,460.97 = 350,493.76 : x
  2. Step 2: Convert to fraction form
    640,939.85/884,460.97 = 350,493.76/x
  3. Step 3: Cross multiply
    640,939.85x = 884,460.97 × 350,493.76
  4. Step 4: Simplify right side
    640,939.85x = 309,998,050,948.55
  5. Step 5: Solve for x
    x = 309,998,050,948.55/640,939.85
  6. Step 6: Final answer
    x = 483,661.69

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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.