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Finding the Fourth Proportional to 284.59, 392.47 and 172.54

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Solution

The fourth proportional to 284.59, 392.47 and 172.54 is: 237.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.59 : 392.47 = 172.54 : x
  2. Step 2: Convert to fraction form
    284.59/392.47 = 172.54/x
  3. Step 3: Cross multiply
    284.59x = 392.47 × 172.54
  4. Step 4: Simplify right side
    284.59x = 67,715.91
  5. Step 5: Solve for x
    x = 67,715.91/284.59
  6. Step 6: Final answer
    x = 237.94

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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.