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Finding the Fourth Proportional to 386,616.40, 579,233.40 and 331,320.40

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Solution

The fourth proportional to 386,616.40, 579,233.40 and 331,320.40 is: 496,388.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,616.40 : 579,233.40 = 331,320.40 : x
  2. Step 2: Convert to fraction form
    386,616.40/579,233.40 = 331,320.40/x
  3. Step 3: Cross multiply
    386,616.40x = 579,233.40 × 331,320.40
  4. Step 4: Simplify right side
    386,616.40x = 191,911,841,781.36
  5. Step 5: Solve for x
    x = 191,911,841,781.36/386,616.40
  6. Step 6: Final answer
    x = 496,388.26

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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.