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Finding the Fourth Proportional to 1,284.77, 1,927.15 and 310.87

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Solution

The fourth proportional to 1,284.77, 1,927.15 and 310.87 is: 466.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.77 : 1,927.15 = 310.87 : x
  2. Step 2: Convert to fraction form
    1,284.77/1,927.15 = 310.87/x
  3. Step 3: Cross multiply
    1,284.77x = 1,927.15 × 310.87
  4. Step 4: Simplify right side
    1,284.77x = 599,093.12
  5. Step 5: Solve for x
    x = 599,093.12/1,284.77
  6. Step 6: Final answer
    x = 466.30

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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.