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Finding the Fourth Proportional to 399,566.58, 551,392.65 and 218,279.25

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Solution

The fourth proportional to 399,566.58, 551,392.65 and 218,279.25 is: 301,220.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,566.58 : 551,392.65 = 218,279.25 : x
  2. Step 2: Convert to fraction form
    399,566.58/551,392.65 = 218,279.25/x
  3. Step 3: Cross multiply
    399,566.58x = 551,392.65 × 218,279.25
  4. Step 4: Simplify right side
    399,566.58x = 120,357,574,097.51
  5. Step 5: Solve for x
    x = 120,357,574,097.51/399,566.58
  6. Step 6: Final answer
    x = 301,220.32

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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.