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Finding the Fourth Proportional to 354.61, 488.53 and 284.65

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Solution

The fourth proportional to 354.61, 488.53 and 284.65 is: 392.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.61 : 488.53 = 284.65 : x
  2. Step 2: Convert to fraction form
    354.61/488.53 = 284.65/x
  3. Step 3: Cross multiply
    354.61x = 488.53 × 284.65
  4. Step 4: Simplify right side
    354.61x = 139,059.20
  5. Step 5: Solve for x
    x = 139,059.20/354.61
  6. Step 6: Final answer
    x = 392.15

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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.