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Finding the Fourth Proportional to 290,716.80, 436,075.20 and 157,660.80

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Solution

The fourth proportional to 290,716.80, 436,075.20 and 157,660.80 is: 236,491.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,716.80 : 436,075.20 = 157,660.80 : x
  2. Step 2: Convert to fraction form
    290,716.80/436,075.20 = 157,660.80/x
  3. Step 3: Cross multiply
    290,716.80x = 436,075.20 × 157,660.80
  4. Step 4: Simplify right side
    290,716.80x = 68,751,964,892.16
  5. Step 5: Solve for x
    x = 68,751,964,892.16/290,716.80
  6. Step 6: Final answer
    x = 236,491.20

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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.