Home / 385,083.72-531,439.92-215,318.52

Finding the Fourth Proportional to 385,083.72, 531,439.92 and 215,318.52

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Solution

The fourth proportional to 385,083.72, 531,439.92 and 215,318.52 is: 297,153.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,083.72 : 531,439.92 = 215,318.52 : x
  2. Step 2: Convert to fraction form
    385,083.72/531,439.92 = 215,318.52/x
  3. Step 3: Cross multiply
    385,083.72x = 531,439.92 × 215,318.52
  4. Step 4: Simplify right side
    385,083.72x = 114,428,857,043.32
  5. Step 5: Solve for x
    x = 114,428,857,043.32/385,083.72
  6. Step 6: Final answer
    x = 297,153.19

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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.