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Finding the Fourth Proportional to 1,287.10, 1,930.64 and 465.37

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Solution

The fourth proportional to 1,287.10, 1,930.64 and 465.37 is: 698.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287.10 : 1,930.64 = 465.37 : x
  2. Step 2: Convert to fraction form
    1,287.10/1,930.64 = 465.37/x
  3. Step 3: Cross multiply
    1,287.10x = 1,930.64 × 465.37
  4. Step 4: Simplify right side
    1,287.10x = 898,458.27
  5. Step 5: Solve for x
    x = 898,458.27/1,287.10
  6. Step 6: Final answer
    x = 698.05

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.