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Finding the Fourth Proportional to 1,237.63, 1,705 and 863.93

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Solution

The fourth proportional to 1,237.63, 1,705 and 863.93 is: 1,190.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.63 : 1,705 = 863.93 : x
  2. Step 2: Convert to fraction form
    1,237.63/1,705 = 863.93/x
  3. Step 3: Cross multiply
    1,237.63x = 1,705 × 863.93
  4. Step 4: Simplify right side
    1,237.63x = 1,473,000.65
  5. Step 5: Solve for x
    x = 1,473,000.65/1,237.63
  6. Step 6: Final answer
    x = 1,190.18

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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.