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Finding the Fourth Proportional to 1,295.71, 1,943.16 and 808.90

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Solution

The fourth proportional to 1,295.71, 1,943.16 and 808.90 is: 1,213.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.71 : 1,943.16 = 808.90 : x
  2. Step 2: Convert to fraction form
    1,295.71/1,943.16 = 808.90/x
  3. Step 3: Cross multiply
    1,295.71x = 1,943.16 × 808.90
  4. Step 4: Simplify right side
    1,295.71x = 1,571,822.12
  5. Step 5: Solve for x
    x = 1,571,822.12/1,295.71
  6. Step 6: Final answer
    x = 1,213.10

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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.