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Finding the Fourth Proportional to 399,550.76, 551,848.12 and 318,151.52

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Solution

The fourth proportional to 399,550.76, 551,848.12 and 318,151.52 is: 439,421.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,550.76 : 551,848.12 = 318,151.52 : x
  2. Step 2: Convert to fraction form
    399,550.76/551,848.12 = 318,151.52/x
  3. Step 3: Cross multiply
    399,550.76x = 551,848.12 × 318,151.52
  4. Step 4: Simplify right side
    399,550.76x = 175,571,318,187.14
  5. Step 5: Solve for x
    x = 175,571,318,187.14/399,550.76
  6. Step 6: Final answer
    x = 439,421.81

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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.