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Finding the Fourth Proportional to 284,930.40, 393,080.40 and 171,688.80

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Solution

The fourth proportional to 284,930.40, 393,080.40 and 171,688.80 is: 236,856.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,930.40 : 393,080.40 = 171,688.80 : x
  2. Step 2: Convert to fraction form
    284,930.40/393,080.40 = 171,688.80/x
  3. Step 3: Cross multiply
    284,930.40x = 393,080.40 × 171,688.80
  4. Step 4: Simplify right side
    284,930.40x = 67,487,502,179.52
  5. Step 5: Solve for x
    x = 67,487,502,179.52/284,930.40
  6. Step 6: Final answer
    x = 236,856.10

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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.