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Finding the Fourth Proportional to 358,669.60, 538,004.40 and 122,279.20

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Solution

The fourth proportional to 358,669.60, 538,004.40 and 122,279.20 is: 183,418.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,669.60 : 538,004.40 = 122,279.20 : x
  2. Step 2: Convert to fraction form
    358,669.60/538,004.40 = 122,279.20/x
  3. Step 3: Cross multiply
    358,669.60x = 538,004.40 × 122,279.20
  4. Step 4: Simplify right side
    358,669.60x = 65,786,747,628.48
  5. Step 5: Solve for x
    x = 65,786,747,628.48/358,669.60
  6. Step 6: Final answer
    x = 183,418.80

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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.