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Finding the Fourth Proportional to 399,653.52, 551,515.32 and 218,361.57

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Solution

The fourth proportional to 399,653.52, 551,515.32 and 218,361.57 is: 301,335.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,653.52 : 551,515.32 = 218,361.57 : x
  2. Step 2: Convert to fraction form
    399,653.52/551,515.32 = 218,361.57/x
  3. Step 3: Cross multiply
    399,653.52x = 551,515.32 × 218,361.57
  4. Step 4: Simplify right side
    399,653.52x = 120,429,751,154.25
  5. Step 5: Solve for x
    x = 120,429,751,154.25/399,653.52
  6. Step 6: Final answer
    x = 301,335.39

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1.5x scale

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.