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Finding the Fourth Proportional to 1,305.55, 1,802.51 and 808.89

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Solution

The fourth proportional to 1,305.55, 1,802.51 and 808.89 is: 1,116.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.55 : 1,802.51 = 808.89 : x
  2. Step 2: Convert to fraction form
    1,305.55/1,802.51 = 808.89/x
  3. Step 3: Cross multiply
    1,305.55x = 1,802.51 × 808.89
  4. Step 4: Simplify right side
    1,305.55x = 1,458,032.31
  5. Step 5: Solve for x
    x = 1,458,032.31/1,305.55
  6. Step 6: Final answer
    x = 1,116.80

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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.