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Finding the Fourth Proportional to 355,442.48, 490,192.88 and 294,917.28

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Solution

The fourth proportional to 355,442.48, 490,192.88 and 294,917.28 is: 406,722.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,442.48 : 490,192.88 = 294,917.28 : x
  2. Step 2: Convert to fraction form
    355,442.48/490,192.88 = 294,917.28/x
  3. Step 3: Cross multiply
    355,442.48x = 490,192.88 × 294,917.28
  4. Step 4: Simplify right side
    355,442.48x = 144,566,350,844.97
  5. Step 5: Solve for x
    x = 144,566,350,844.97/355,442.48
  6. Step 6: Final answer
    x = 406,722.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.