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Finding the Fourth Proportional to 399,878.98, 551,831.74 and 218,590.95

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Solution

The fourth proportional to 399,878.98, 551,831.74 and 218,590.95 is: 301,654.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,878.98 : 551,831.74 = 218,590.95 : x
  2. Step 2: Convert to fraction form
    399,878.98/551,831.74 = 218,590.95/x
  3. Step 3: Cross multiply
    399,878.98x = 551,831.74 × 218,590.95
  4. Step 4: Simplify right side
    399,878.98x = 120,625,425,809.65
  5. Step 5: Solve for x
    x = 120,625,425,809.65/399,878.98
  6. Step 6: Final answer
    x = 301,654.83

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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.