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Finding the Fourth Proportional to 522,697.76, 721,618.44 and 399,959.36

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Solution

The fourth proportional to 522,697.76, 721,618.44 and 399,959.36 is: 552,170.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,697.76 : 721,618.44 = 399,959.36 : x
  2. Step 2: Convert to fraction form
    522,697.76/721,618.44 = 399,959.36/x
  3. Step 3: Cross multiply
    522,697.76x = 721,618.44 × 399,959.36
  4. Step 4: Simplify right side
    522,697.76x = 288,618,049,426.60
  5. Step 5: Solve for x
    x = 288,618,049,426.60/522,697.76
  6. Step 6: Final answer
    x = 552,170.05

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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.