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Finding the Fourth Proportional to 398,942.72, 550,740.48 and 248,088.32

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Solution

The fourth proportional to 398,942.72, 550,740.48 and 248,088.32 is: 342,485.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,942.72 : 550,740.48 = 248,088.32 : x
  2. Step 2: Convert to fraction form
    398,942.72/550,740.48 = 248,088.32/x
  3. Step 3: Cross multiply
    398,942.72x = 550,740.48 × 248,088.32
  4. Step 4: Simplify right side
    398,942.72x = 136,632,280,439.19
  5. Step 5: Solve for x
    x = 136,632,280,439.19/398,942.72
  6. Step 6: Final answer
    x = 342,485.96

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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.