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Finding the Fourth Proportional to 721,940.22, 996,289.29 and 395,247.76

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Solution

The fourth proportional to 721,940.22, 996,289.29 and 395,247.76 is: 545,448.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,940.22 : 996,289.29 = 395,247.76 : x
  2. Step 2: Convert to fraction form
    721,940.22/996,289.29 = 395,247.76/x
  3. Step 3: Cross multiply
    721,940.22x = 996,289.29 × 395,247.76
  4. Step 4: Simplify right side
    721,940.22x = 393,781,107,693.77
  5. Step 5: Solve for x
    x = 393,781,107,693.77/721,940.22
  6. Step 6: Final answer
    x = 545,448.36

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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.