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Finding the Fourth Proportional to 802.18, 1,108.50 and 774.82

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Solution

The fourth proportional to 802.18, 1,108.50 and 774.82 is: 1,070.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.18 : 1,108.50 = 774.82 : x
  2. Step 2: Convert to fraction form
    802.18/1,108.50 = 774.82/x
  3. Step 3: Cross multiply
    802.18x = 1,108.50 × 774.82
  4. Step 4: Simplify right side
    802.18x = 858,887.97
  5. Step 5: Solve for x
    x = 858,887.97/802.18
  6. Step 6: Final answer
    x = 1,070.69

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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.