Home / 399,639.62-551,496.23-218,347.65

Finding the Fourth Proportional to 399,639.62, 551,496.23 and 218,347.65

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Solution

The fourth proportional to 399,639.62, 551,496.23 and 218,347.65 is: 301,316.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,639.62 : 551,496.23 = 218,347.65 : x
  2. Step 2: Convert to fraction form
    399,639.62/551,496.23 = 218,347.65/x
  3. Step 3: Cross multiply
    399,639.62x = 551,496.23 × 218,347.65
  4. Step 4: Simplify right side
    399,639.62x = 120,417,905,531.43
  5. Step 5: Solve for x
    x = 120,417,905,531.43/399,639.62
  6. Step 6: Final answer
    x = 301,316.23

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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.