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Finding the Fourth Proportional to 855.64, 1,274.63 and 802.52

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Solution

The fourth proportional to 855.64, 1,274.63 and 802.52 is: 1,195.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.64 : 1,274.63 = 802.52 : x
  2. Step 2: Convert to fraction form
    855.64/1,274.63 = 802.52/x
  3. Step 3: Cross multiply
    855.64x = 1,274.63 × 802.52
  4. Step 4: Simplify right side
    855.64x = 1,022,916.07
  5. Step 5: Solve for x
    x = 1,022,916.07/855.64
  6. Step 6: Final answer
    x = 1,195.50

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.