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Finding the Fourth Proportional to 387,304.56, 534,331.35 and 285,571.80

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Solution

The fourth proportional to 387,304.56, 534,331.35 and 285,571.80 is: 393,979.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,304.56 : 534,331.35 = 285,571.80 : x
  2. Step 2: Convert to fraction form
    387,304.56/534,331.35 = 285,571.80/x
  3. Step 3: Cross multiply
    387,304.56x = 534,331.35 × 285,571.80
  4. Step 4: Simplify right side
    387,304.56x = 152,589,965,415.93
  5. Step 5: Solve for x
    x = 152,589,965,415.93/387,304.56
  6. Step 6: Final answer
    x = 393,979.26

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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.