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Finding the Fourth Proportional to 215,363.30, 297,121.60 and 215,031.16

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Solution

The fourth proportional to 215,363.30, 297,121.60 and 215,031.16 is: 296,663.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,363.30 : 297,121.60 = 215,031.16 : x
  2. Step 2: Convert to fraction form
    215,363.30/297,121.60 = 215,031.16/x
  3. Step 3: Cross multiply
    215,363.30x = 297,121.60 × 215,031.16
  4. Step 4: Simplify right side
    215,363.30x = 63,890,401,028.67
  5. Step 5: Solve for x
    x = 63,890,401,028.67/215,363.30
  6. Step 6: Final answer
    x = 296,663.36

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1.5x scale

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.