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Finding the Fourth Proportional to 1,394.90, 1,924.16 and 805.32

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Solution

The fourth proportional to 1,394.90, 1,924.16 and 805.32 is: 1,110.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.90 : 1,924.16 = 805.32 : x
  2. Step 2: Convert to fraction form
    1,394.90/1,924.16 = 805.32/x
  3. Step 3: Cross multiply
    1,394.90x = 1,924.16 × 805.32
  4. Step 4: Simplify right side
    1,394.90x = 1,549,560.50
  5. Step 5: Solve for x
    x = 1,549,560.50/1,394.90
  6. Step 6: Final answer
    x = 1,110.88

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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.