Home / 290,870.36-436,292.80-91,186.20

Finding the Fourth Proportional to 290,870.36, 436,292.80 and 91,186.20

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Solution

The fourth proportional to 290,870.36, 436,292.80 and 91,186.20 is: 136,775.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,870.36 : 436,292.80 = 91,186.20 : x
  2. Step 2: Convert to fraction form
    290,870.36/436,292.80 = 91,186.20/x
  3. Step 3: Cross multiply
    290,870.36x = 436,292.80 × 91,186.20
  4. Step 4: Simplify right side
    290,870.36x = 39,783,882,519.36
  5. Step 5: Solve for x
    x = 39,783,882,519.36/290,870.36
  6. Step 6: Final answer
    x = 136,775.31

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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.