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Finding the Fourth Proportional to 1,802.70, 2,702.30 and 981.09

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Solution

The fourth proportional to 1,802.70, 2,702.30 and 981.09 is: 1,470.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,802.70 : 2,702.30 = 981.09 : x
  2. Step 2: Convert to fraction form
    1,802.70/2,702.30 = 981.09/x
  3. Step 3: Cross multiply
    1,802.70x = 2,702.30 × 981.09
  4. Step 4: Simplify right side
    1,802.70x = 2,651,194.60
  5. Step 5: Solve for x
    x = 2,651,194.60/1,802.70
  6. Step 6: Final answer
    x = 1,470.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.