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Finding the Fourth Proportional to 802.05, 1,104.25 and 624.80

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Solution

The fourth proportional to 802.05, 1,104.25 and 624.80 is: 860.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.05 : 1,104.25 = 624.80 : x
  2. Step 2: Convert to fraction form
    802.05/1,104.25 = 624.80/x
  3. Step 3: Cross multiply
    802.05x = 1,104.25 × 624.80
  4. Step 4: Simplify right side
    802.05x = 689,935.40
  5. Step 5: Solve for x
    x = 689,935.40/802.05
  6. Step 6: Final answer
    x = 860.21

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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.