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Finding the Fourth Proportional to 353,810.80, 530,844.18 and 218,716.84

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Solution

The fourth proportional to 353,810.80, 530,844.18 and 218,716.84 is: 328,154.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,810.80 : 530,844.18 = 218,716.84 : x
  2. Step 2: Convert to fraction form
    353,810.80/530,844.18 = 218,716.84/x
  3. Step 3: Cross multiply
    353,810.80x = 530,844.18 × 218,716.84
  4. Step 4: Simplify right side
    353,810.80x = 116,104,561,581.99
  5. Step 5: Solve for x
    x = 116,104,561,581.99/353,810.80
  6. Step 6: Final answer
    x = 328,154.37

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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.