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Finding the Fourth Proportional to 1,430, 1,971.72 and 963.44

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Solution

The fourth proportional to 1,430, 1,971.72 and 963.44 is: 1,328.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430 : 1,971.72 = 963.44 : x
  2. Step 2: Convert to fraction form
    1,430/1,971.72 = 963.44/x
  3. Step 3: Cross multiply
    1,430x = 1,971.72 × 963.44
  4. Step 4: Simplify right side
    1,430x = 1,899,633.92
  5. Step 5: Solve for x
    x = 1,899,633.92/1,430
  6. Step 6: Final answer
    x = 1,328.42

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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.