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Finding the Fourth Proportional to 285,417.54, 393,957.27 and 172,247.58

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Solution

The fourth proportional to 285,417.54, 393,957.27 and 172,247.58 is: 237,750.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,417.54 : 393,957.27 = 172,247.58 : x
  2. Step 2: Convert to fraction form
    285,417.54/393,957.27 = 172,247.58/x
  3. Step 3: Cross multiply
    285,417.54x = 393,957.27 × 172,247.58
  4. Step 4: Simplify right side
    285,417.54x = 67,858,186,380.91
  5. Step 5: Solve for x
    x = 67,858,186,380.91/285,417.54
  6. Step 6: Final answer
    x = 237,750.58

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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.