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Finding the Fourth Proportional to 1,295.38, 1,943.37 and 429.69

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Solution

The fourth proportional to 1,295.38, 1,943.37 and 429.69 is: 644.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.38 : 1,943.37 = 429.69 : x
  2. Step 2: Convert to fraction form
    1,295.38/1,943.37 = 429.69/x
  3. Step 3: Cross multiply
    1,295.38x = 1,943.37 × 429.69
  4. Step 4: Simplify right side
    1,295.38x = 835,044.51
  5. Step 5: Solve for x
    x = 835,044.51/1,295.38
  6. Step 6: Final answer
    x = 644.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.