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Finding the Fourth Proportional to 399,656.22, 551,529.46 and 218,368.14

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Solution

The fourth proportional to 399,656.22, 551,529.46 and 218,368.14 is: 301,350.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,656.22 : 551,529.46 = 218,368.14 : x
  2. Step 2: Convert to fraction form
    399,656.22/551,529.46 = 218,368.14/x
  3. Step 3: Cross multiply
    399,656.22x = 551,529.46 × 218,368.14
  4. Step 4: Simplify right side
    399,656.22x = 120,436,462,335.40
  5. Step 5: Solve for x
    x = 120,436,462,335.40/399,656.22
  6. Step 6: Final answer
    x = 301,350.15

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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.