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Finding the Fourth Proportional to 384,893.15, 531,131.12 and 212,801.16

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Solution

The fourth proportional to 384,893.15, 531,131.12 and 212,801.16 is: 293,653.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,893.15 : 531,131.12 = 212,801.16 : x
  2. Step 2: Convert to fraction form
    384,893.15/531,131.12 = 212,801.16/x
  3. Step 3: Cross multiply
    384,893.15x = 531,131.12 × 212,801.16
  4. Step 4: Simplify right side
    384,893.15x = 113,025,317,384.09
  5. Step 5: Solve for x
    x = 113,025,317,384.09/384,893.15
  6. Step 6: Final answer
    x = 293,653.76

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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.