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Finding the Fourth Proportional to 640,169.69, 883,358.88 and 353,672.69

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Solution

The fourth proportional to 640,169.69, 883,358.88 and 353,672.69 is: 488,026.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,169.69 : 883,358.88 = 353,672.69 : x
  2. Step 2: Convert to fraction form
    640,169.69/883,358.88 = 353,672.69/x
  3. Step 3: Cross multiply
    640,169.69x = 883,358.88 × 353,672.69
  4. Step 4: Simplify right side
    640,169.69x = 312,419,911,324.99
  5. Step 5: Solve for x
    x = 312,419,911,324.99/640,169.69
  6. Step 6: Final answer
    x = 488,026.72

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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.