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Finding the Fourth Proportional to 640,220.55, 883,502.54 and 353,738.58

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Solution

The fourth proportional to 640,220.55, 883,502.54 and 353,738.58 is: 488,158.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,220.55 : 883,502.54 = 353,738.58 : x
  2. Step 2: Convert to fraction form
    640,220.55/883,502.54 = 353,738.58/x
  3. Step 3: Cross multiply
    640,220.55x = 883,502.54 × 353,738.58
  4. Step 4: Simplify right side
    640,220.55x = 312,528,932,157.30
  5. Step 5: Solve for x
    x = 312,528,932,157.30/640,220.55
  6. Step 6: Final answer
    x = 488,158.23

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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.