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Finding the Fourth Proportional to 397,126.90, 548,039.32 and 215,838.88

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Solution

The fourth proportional to 397,126.90, 548,039.32 and 215,838.88 is: 297,859.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,126.90 : 548,039.32 = 215,838.88 : x
  2. Step 2: Convert to fraction form
    397,126.90/548,039.32 = 215,838.88/x
  3. Step 3: Cross multiply
    397,126.90x = 548,039.32 × 215,838.88
  4. Step 4: Simplify right side
    397,126.90x = 118,288,191,115.07
  5. Step 5: Solve for x
    x = 118,288,191,115.07/397,126.90
  6. Step 6: Final answer
    x = 297,859.93

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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.