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Finding the Fourth Proportional to 1,419.69, 1,959.44 and 798.69

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Solution

The fourth proportional to 1,419.69, 1,959.44 and 798.69 is: 1,102.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.69 : 1,959.44 = 798.69 : x
  2. Step 2: Convert to fraction form
    1,419.69/1,959.44 = 798.69/x
  3. Step 3: Cross multiply
    1,419.69x = 1,959.44 × 798.69
  4. Step 4: Simplify right side
    1,419.69x = 1,564,985.13
  5. Step 5: Solve for x
    x = 1,564,985.13/1,419.69
  6. Step 6: Final answer
    x = 1,102.34

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Double scale
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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.