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Finding the Fourth Proportional to 308,806.14, 426,055.32 and 172,818.48

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Solution

The fourth proportional to 308,806.14, 426,055.32 and 172,818.48 is: 238,435.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,806.14 : 426,055.32 = 172,818.48 : x
  2. Step 2: Convert to fraction form
    308,806.14/426,055.32 = 172,818.48/x
  3. Step 3: Cross multiply
    308,806.14x = 426,055.32 × 172,818.48
  4. Step 4: Simplify right side
    308,806.14x = 73,630,232,798.31
  5. Step 5: Solve for x
    x = 73,630,232,798.31/308,806.14
  6. Step 6: Final answer
    x = 238,435.13

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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.