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Finding the Fourth Proportional to 1,434.07, 1,979.12 and 804.60

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Solution

The fourth proportional to 1,434.07, 1,979.12 and 804.60 is: 1,110.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434.07 : 1,979.12 = 804.60 : x
  2. Step 2: Convert to fraction form
    1,434.07/1,979.12 = 804.60/x
  3. Step 3: Cross multiply
    1,434.07x = 1,979.12 × 804.60
  4. Step 4: Simplify right side
    1,434.07x = 1,592,399.95
  5. Step 5: Solve for x
    x = 1,592,399.95/1,434.07
  6. Step 6: Final answer
    x = 1,110.41

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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.