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Finding the Fourth Proportional to 1,368.62, 1,888.62 and 808.96

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Solution

The fourth proportional to 1,368.62, 1,888.62 and 808.96 is: 1,116.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.62 : 1,888.62 = 808.96 : x
  2. Step 2: Convert to fraction form
    1,368.62/1,888.62 = 808.96/x
  3. Step 3: Cross multiply
    1,368.62x = 1,888.62 × 808.96
  4. Step 4: Simplify right side
    1,368.62x = 1,527,818.04
  5. Step 5: Solve for x
    x = 1,527,818.04/1,368.62
  6. Step 6: Final answer
    x = 1,116.32

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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.