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Finding the Fourth Proportional to 359,292.80, 538,939.20 and 122,643.20

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Solution

The fourth proportional to 359,292.80, 538,939.20 and 122,643.20 is: 183,964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,292.80 : 538,939.20 = 122,643.20 : x
  2. Step 2: Convert to fraction form
    359,292.80/538,939.20 = 122,643.20/x
  3. Step 3: Cross multiply
    359,292.80x = 538,939.20 × 122,643.20
  4. Step 4: Simplify right side
    359,292.80x = 66,097,228,093.44
  5. Step 5: Solve for x
    x = 66,097,228,093.44/359,292.80
  6. Step 6: Final answer
    x = 183,964.80

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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.