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Finding the Fourth Proportional to 1,394.68, 1,925.14 and 805.46

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Solution

The fourth proportional to 1,394.68, 1,925.14 and 805.46 is: 1,111.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.68 : 1,925.14 = 805.46 : x
  2. Step 2: Convert to fraction form
    1,394.68/1,925.14 = 805.46/x
  3. Step 3: Cross multiply
    1,394.68x = 1,925.14 × 805.46
  4. Step 4: Simplify right side
    1,394.68x = 1,550,623.26
  5. Step 5: Solve for x
    x = 1,550,623.26/1,394.68
  6. Step 6: Final answer
    x = 1,111.81

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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.