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Finding the Fourth Proportional to 359,287.21, 538,782.54 and 122,648.95

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Solution

The fourth proportional to 359,287.21, 538,782.54 and 122,648.95 is: 183,922.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,287.21 : 538,782.54 = 122,648.95 : x
  2. Step 2: Convert to fraction form
    359,287.21/538,782.54 = 122,648.95/x
  3. Step 3: Cross multiply
    359,287.21x = 538,782.54 × 122,648.95
  4. Step 4: Simplify right side
    359,287.21x = 66,081,112,809.33
  5. Step 5: Solve for x
    x = 66,081,112,809.33/359,287.21
  6. Step 6: Final answer
    x = 183,922.81

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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.