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Finding the Fourth Proportional to 640,672.20, 884,049.96 and 354,152.52

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Solution

The fourth proportional to 640,672.20, 884,049.96 and 354,152.52 is: 488,687.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,672.20 : 884,049.96 = 354,152.52 : x
  2. Step 2: Convert to fraction form
    640,672.20/884,049.96 = 354,152.52/x
  3. Step 3: Cross multiply
    640,672.20x = 884,049.96 × 354,152.52
  4. Step 4: Simplify right side
    640,672.20x = 313,088,521,139.90
  5. Step 5: Solve for x
    x = 313,088,521,139.90/640,672.20
  6. Step 6: Final answer
    x = 488,687.54

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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.