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Finding the Fourth Proportional to 1,055.05, 1,584.62 and 860.19

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Solution

The fourth proportional to 1,055.05, 1,584.62 and 860.19 is: 1,291.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.05 : 1,584.62 = 860.19 : x
  2. Step 2: Convert to fraction form
    1,055.05/1,584.62 = 860.19/x
  3. Step 3: Cross multiply
    1,055.05x = 1,584.62 × 860.19
  4. Step 4: Simplify right side
    1,055.05x = 1,363,076.43
  5. Step 5: Solve for x
    x = 1,363,076.43/1,055.05
  6. Step 6: Final answer
    x = 1,291.96

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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.