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Finding the Fourth Proportional to 1,235.37, 1,853.36 and 870.87

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Solution

The fourth proportional to 1,235.37, 1,853.36 and 870.87 is: 1,306.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.37 : 1,853.36 = 870.87 : x
  2. Step 2: Convert to fraction form
    1,235.37/1,853.36 = 870.87/x
  3. Step 3: Cross multiply
    1,235.37x = 1,853.36 × 870.87
  4. Step 4: Simplify right side
    1,235.37x = 1,614,035.96
  5. Step 5: Solve for x
    x = 1,614,035.96/1,235.37
  6. Step 6: Final answer
    x = 1,306.52

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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.