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Finding the Fourth Proportional to 387,442.08, 534,668.04 and 217,674.72

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Solution

The fourth proportional to 387,442.08, 534,668.04 and 217,674.72 is: 300,389.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,442.08 : 534,668.04 = 217,674.72 : x
  2. Step 2: Convert to fraction form
    387,442.08/534,668.04 = 217,674.72/x
  3. Step 3: Cross multiply
    387,442.08x = 534,668.04 × 217,674.72
  4. Step 4: Simplify right side
    387,442.08x = 116,383,715,899.95
  5. Step 5: Solve for x
    x = 116,383,715,899.95/387,442.08
  6. Step 6: Final answer
    x = 300,389.97

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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.