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Finding the Fourth Proportional to 399,315.58, 551,051.33 and 218,026.95

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Solution

The fourth proportional to 399,315.58, 551,051.33 and 218,026.95 is: 300,874.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,315.58 : 551,051.33 = 218,026.95 : x
  2. Step 2: Convert to fraction form
    399,315.58/551,051.33 = 218,026.95/x
  3. Step 3: Cross multiply
    399,315.58x = 551,051.33 × 218,026.95
  4. Step 4: Simplify right side
    399,315.58x = 120,144,040,228.28
  5. Step 5: Solve for x
    x = 120,144,040,228.28/399,315.58
  6. Step 6: Final answer
    x = 300,874.91

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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.