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Finding the Fourth Proportional to 1,368.24, 1,888.10 and 808.58

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Solution

The fourth proportional to 1,368.24, 1,888.10 and 808.58 is: 1,115.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.24 : 1,888.10 = 808.58 : x
  2. Step 2: Convert to fraction form
    1,368.24/1,888.10 = 808.58/x
  3. Step 3: Cross multiply
    1,368.24x = 1,888.10 × 808.58
  4. Step 4: Simplify right side
    1,368.24x = 1,526,679.90
  5. Step 5: Solve for x
    x = 1,526,679.90/1,368.24
  6. Step 6: Final answer
    x = 1,115.80

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1.5x scale

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.