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Finding the Fourth Proportional to 640,521.25, 883,937.19 and 354,059.76

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Solution

The fourth proportional to 640,521.25, 883,937.19 and 354,059.76 is: 488,612.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,521.25 : 883,937.19 = 354,059.76 : x
  2. Step 2: Convert to fraction form
    640,521.25/883,937.19 = 354,059.76/x
  3. Step 3: Cross multiply
    640,521.25x = 883,937.19 × 354,059.76
  4. Step 4: Simplify right side
    640,521.25x = 312,966,586,251.48
  5. Step 5: Solve for x
    x = 312,966,586,251.48/640,521.25
  6. Step 6: Final answer
    x = 488,612.34

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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.