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Finding the Fourth Proportional to 499,025.68, 687,938.41 and 355,536.61

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Solution

The fourth proportional to 499,025.68, 687,938.41 and 355,536.61 is: 490,129.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,025.68 : 687,938.41 = 355,536.61 : x
  2. Step 2: Convert to fraction form
    499,025.68/687,938.41 = 355,536.61/x
  3. Step 3: Cross multiply
    499,025.68x = 687,938.41 × 355,536.61
  4. Step 4: Simplify right side
    499,025.68x = 244,587,287,571.50
  5. Step 5: Solve for x
    x = 244,587,287,571.50/499,025.68
  6. Step 6: Final answer
    x = 490,129.66

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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.