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Finding the Fourth Proportional to 308,580.36, 425,880.28 and 172,621.86

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Solution

The fourth proportional to 308,580.36, 425,880.28 and 172,621.86 is: 238,240.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,580.36 : 425,880.28 = 172,621.86 : x
  2. Step 2: Convert to fraction form
    308,580.36/425,880.28 = 172,621.86/x
  3. Step 3: Cross multiply
    308,580.36x = 425,880.28 × 172,621.86
  4. Step 4: Simplify right side
    308,580.36x = 73,516,246,070.92
  5. Step 5: Solve for x
    x = 73,516,246,070.92/308,580.36
  6. Step 6: Final answer
    x = 238,240.20

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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.