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Finding the Fourth Proportional to 397,143.02, 548,062.91 and 215,854.89

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Solution

The fourth proportional to 397,143.02, 548,062.91 and 215,854.89 is: 297,882.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,143.02 : 548,062.91 = 215,854.89 : x
  2. Step 2: Convert to fraction form
    397,143.02/548,062.91 = 215,854.89/x
  3. Step 3: Cross multiply
    397,143.02x = 548,062.91 × 215,854.89
  4. Step 4: Simplify right side
    397,143.02x = 118,302,058,071.86
  5. Step 5: Solve for x
    x = 118,302,058,071.86/397,143.02
  6. Step 6: Final answer
    x = 297,882.76

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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.