Home / 385,942.72-579,142.40-215,308.16

Finding the Fourth Proportional to 385,942.72, 579,142.40 and 215,308.16

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Solution

The fourth proportional to 385,942.72, 579,142.40 and 215,308.16 is: 323,089.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,942.72 : 579,142.40 = 215,308.16 : x
  2. Step 2: Convert to fraction form
    385,942.72/579,142.40 = 215,308.16/x
  3. Step 3: Cross multiply
    385,942.72x = 579,142.40 × 215,308.16
  4. Step 4: Simplify right side
    385,942.72x = 124,694,084,521.98
  5. Step 5: Solve for x
    x = 124,694,084,521.98/385,942.72
  6. Step 6: Final answer
    x = 323,089.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.