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Finding the Fourth Proportional to 480.85, 663.57 and 284.35

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Solution

The fourth proportional to 480.85, 663.57 and 284.35 is: 392.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.85 : 663.57 = 284.35 : x
  2. Step 2: Convert to fraction form
    480.85/663.57 = 284.35/x
  3. Step 3: Cross multiply
    480.85x = 663.57 × 284.35
  4. Step 4: Simplify right side
    480.85x = 188,686.13
  5. Step 5: Solve for x
    x = 188,686.13/480.85
  6. Step 6: Final answer
    x = 392.40

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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.