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Finding the Fourth Proportional to 217,420.74, 302,049.54 and 215,474.31

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Solution

The fourth proportional to 217,420.74, 302,049.54 and 215,474.31 is: 299,345.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,420.74 : 302,049.54 = 215,474.31 : x
  2. Step 2: Convert to fraction form
    217,420.74/302,049.54 = 215,474.31/x
  3. Step 3: Cross multiply
    217,420.74x = 302,049.54 × 215,474.31
  4. Step 4: Simplify right side
    217,420.74x = 65,083,916,217.32
  5. Step 5: Solve for x
    x = 65,083,916,217.32/217,420.74
  6. Step 6: Final answer
    x = 299,345.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.