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Finding the Fourth Proportional to 286,753.72, 395,742.30 and 172,036.66

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Solution

The fourth proportional to 286,753.72, 395,742.30 and 172,036.66 is: 237,423.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,753.72 : 395,742.30 = 172,036.66 : x
  2. Step 2: Convert to fraction form
    286,753.72/395,742.30 = 172,036.66/x
  3. Step 3: Cross multiply
    286,753.72x = 395,742.30 × 172,036.66
  4. Step 4: Simplify right side
    286,753.72x = 68,082,183,512.72
  5. Step 5: Solve for x
    x = 68,082,183,512.72/286,753.72
  6. Step 6: Final answer
    x = 237,423.89

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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.