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Finding the Fourth Proportional to 1,370.08, 1,889.70 and 976.96

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Solution

The fourth proportional to 1,370.08, 1,889.70 and 976.96 is: 1,347.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.08 : 1,889.70 = 976.96 : x
  2. Step 2: Convert to fraction form
    1,370.08/1,889.70 = 976.96/x
  3. Step 3: Cross multiply
    1,370.08x = 1,889.70 × 976.96
  4. Step 4: Simplify right side
    1,370.08x = 1,846,161.31
  5. Step 5: Solve for x
    x = 1,846,161.31/1,370.08
  6. Step 6: Final answer
    x = 1,347.48

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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.