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Finding the Fourth Proportional to 356,716.80, 534,621.60 and 146,116.80

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Solution

The fourth proportional to 356,716.80, 534,621.60 and 146,116.80 is: 218,989.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,716.80 : 534,621.60 = 146,116.80 : x
  2. Step 2: Convert to fraction form
    356,716.80/534,621.60 = 146,116.80/x
  3. Step 3: Cross multiply
    356,716.80x = 534,621.60 × 146,116.80
  4. Step 4: Simplify right side
    356,716.80x = 78,117,197,402.88
  5. Step 5: Solve for x
    x = 78,117,197,402.88/356,716.80
  6. Step 6: Final answer
    x = 218,989.40

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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.