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Finding the Fourth Proportional to 1,394.47, 1,924.65 and 804.92

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Solution

The fourth proportional to 1,394.47, 1,924.65 and 804.92 is: 1,110.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.47 : 1,924.65 = 804.92 : x
  2. Step 2: Convert to fraction form
    1,394.47/1,924.65 = 804.92/x
  3. Step 3: Cross multiply
    1,394.47x = 1,924.65 × 804.92
  4. Step 4: Simplify right side
    1,394.47x = 1,549,194.09
  5. Step 5: Solve for x
    x = 1,549,194.09/1,394.47
  6. Step 6: Final answer
    x = 1,110.96

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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.