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Finding the Fourth Proportional to 399,451.76, 551,240.47 and 218,163.77

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Solution

The fourth proportional to 399,451.76, 551,240.47 and 218,163.77 is: 301,064.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,451.76 : 551,240.47 = 218,163.77 : x
  2. Step 2: Convert to fraction form
    399,451.76/551,240.47 = 218,163.77/x
  3. Step 3: Cross multiply
    399,451.76x = 551,240.47 × 218,163.77
  4. Step 4: Simplify right side
    399,451.76x = 120,260,699,111.77
  5. Step 5: Solve for x
    x = 120,260,699,111.77/399,451.76
  6. Step 6: Final answer
    x = 301,064.39

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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.