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Finding the Fourth Proportional to 1,295.44, 1,943.17 and 429.75

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Solution

The fourth proportional to 1,295.44, 1,943.17 and 429.75 is: 644.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.44 : 1,943.17 = 429.75 : x
  2. Step 2: Convert to fraction form
    1,295.44/1,943.17 = 429.75/x
  3. Step 3: Cross multiply
    1,295.44x = 1,943.17 × 429.75
  4. Step 4: Simplify right side
    1,295.44x = 835,076.23
  5. Step 5: Solve for x
    x = 835,076.23/1,295.44
  6. Step 6: Final answer
    x = 644.63

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Double scale
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Similar ratio
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1.5x scale

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.