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Finding the Fourth Proportional to 1,865.39, 2,796.32 and 631.92

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Solution

The fourth proportional to 1,865.39, 2,796.32 and 631.92 is: 947.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,865.39 : 2,796.32 = 631.92 : x
  2. Step 2: Convert to fraction form
    1,865.39/2,796.32 = 631.92/x
  3. Step 3: Cross multiply
    1,865.39x = 2,796.32 × 631.92
  4. Step 4: Simplify right side
    1,865.39x = 1,767,047.37
  5. Step 5: Solve for x
    x = 1,767,047.37/1,865.39
  6. Step 6: Final answer
    x = 947.28

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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.