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Finding the Fourth Proportional to 1,235.80, 1,854.05 and 585.64

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Solution

The fourth proportional to 1,235.80, 1,854.05 and 585.64 is: 878.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.80 : 1,854.05 = 585.64 : x
  2. Step 2: Convert to fraction form
    1,235.80/1,854.05 = 585.64/x
  3. Step 3: Cross multiply
    1,235.80x = 1,854.05 × 585.64
  4. Step 4: Simplify right side
    1,235.80x = 1,085,805.84
  5. Step 5: Solve for x
    x = 1,085,805.84/1,235.80
  6. Step 6: Final answer
    x = 878.63

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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.