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Finding the Fourth Proportional to 387,157.66, 534,259.40 and 215,086.73

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Solution

The fourth proportional to 387,157.66, 534,259.40 and 215,086.73 is: 296,809.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,157.66 : 534,259.40 = 215,086.73 : x
  2. Step 2: Convert to fraction form
    387,157.66/534,259.40 = 215,086.73/x
  3. Step 3: Cross multiply
    387,157.66x = 534,259.40 × 215,086.73
  4. Step 4: Simplify right side
    387,157.66x = 114,912,103,571.03
  5. Step 5: Solve for x
    x = 114,912,103,571.03/387,157.66
  6. Step 6: Final answer
    x = 296,809.58

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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.