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Finding the Fourth Proportional to 640,219.42, 883,500.98 and 353,737.47

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Solution

The fourth proportional to 640,219.42, 883,500.98 and 353,737.47 is: 488,156.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,219.42 : 883,500.98 = 353,737.47 : x
  2. Step 2: Convert to fraction form
    640,219.42/883,500.98 = 353,737.47/x
  3. Step 3: Cross multiply
    640,219.42x = 883,500.98 × 353,737.47
  4. Step 4: Simplify right side
    640,219.42x = 312,527,396,990.22
  5. Step 5: Solve for x
    x = 312,527,396,990.22/640,219.42
  6. Step 6: Final answer
    x = 488,156.70

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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.