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Finding the Fourth Proportional to 386,534.40, 579,801.60 and 331,238.40

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Solution

The fourth proportional to 386,534.40, 579,801.60 and 331,238.40 is: 496,857.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,534.40 : 579,801.60 = 331,238.40 : x
  2. Step 2: Convert to fraction form
    386,534.40/579,801.60 = 331,238.40/x
  3. Step 3: Cross multiply
    386,534.40x = 579,801.60 × 331,238.40
  4. Step 4: Simplify right side
    386,534.40x = 192,052,554,301.44
  5. Step 5: Solve for x
    x = 192,052,554,301.44/386,534.40
  6. Step 6: Final answer
    x = 496,857.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.