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Finding the Fourth Proportional to 387,158.66, 534,260.77 and 215,087.73

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Solution

The fourth proportional to 387,158.66, 534,260.77 and 215,087.73 is: 296,810.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,158.66 : 534,260.77 = 215,087.73 : x
  2. Step 2: Convert to fraction form
    387,158.66/534,260.77 = 215,087.73/x
  3. Step 3: Cross multiply
    387,158.66x = 534,260.77 × 215,087.73
  4. Step 4: Simplify right side
    387,158.66x = 114,912,936,247.35
  5. Step 5: Solve for x
    x = 114,912,936,247.35/387,158.66
  6. Step 6: Final answer
    x = 296,810.97

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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.