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Finding the Fourth Proportional to 284.55, 392.52 and 210.74

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Solution

The fourth proportional to 284.55, 392.52 and 210.74 is: 290.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.55 : 392.52 = 210.74 : x
  2. Step 2: Convert to fraction form
    284.55/392.52 = 210.74/x
  3. Step 3: Cross multiply
    284.55x = 392.52 × 210.74
  4. Step 4: Simplify right side
    284.55x = 82,719.91
  5. Step 5: Solve for x
    x = 82,719.91/284.55
  6. Step 6: Final answer
    x = 290.70

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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.