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Finding the Fourth Proportional to 391,894.45, 540,864.36 and 230,764.49

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Solution

The fourth proportional to 391,894.45, 540,864.36 and 230,764.49 is: 318,484.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,894.45 : 540,864.36 = 230,764.49 : x
  2. Step 2: Convert to fraction form
    391,894.45/540,864.36 = 230,764.49/x
  3. Step 3: Cross multiply
    391,894.45x = 540,864.36 × 230,764.49
  4. Step 4: Simplify right side
    391,894.45x = 124,812,285,490.26
  5. Step 5: Solve for x
    x = 124,812,285,490.26/391,894.45
  6. Step 6: Final answer
    x = 318,484.44

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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.