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Finding the Fourth Proportional to 624.58, 862.84 and 485.04

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Solution

The fourth proportional to 624.58, 862.84 and 485.04 is: 670.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.58 : 862.84 = 485.04 : x
  2. Step 2: Convert to fraction form
    624.58/862.84 = 485.04/x
  3. Step 3: Cross multiply
    624.58x = 862.84 × 485.04
  4. Step 4: Simplify right side
    624.58x = 418,511.91
  5. Step 5: Solve for x
    x = 418,511.91/624.58
  6. Step 6: Final answer
    x = 670.07

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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.