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Finding the Fourth Proportional to 355,356.72, 490,245.75 and 247,989.06

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Solution

The fourth proportional to 355,356.72, 490,245.75 and 247,989.06 is: 342,122.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,356.72 : 490,245.75 = 247,989.06 : x
  2. Step 2: Convert to fraction form
    355,356.72/490,245.75 = 247,989.06/x
  3. Step 3: Cross multiply
    355,356.72x = 490,245.75 × 247,989.06
  4. Step 4: Simplify right side
    355,356.72x = 121,575,582,711.50
  5. Step 5: Solve for x
    x = 121,575,582,711.50/355,356.72
  6. Step 6: Final answer
    x = 342,122.65

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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.