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Finding the Fourth Proportional to 1,276.81, 1,914.61 and 583.28

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Solution

The fourth proportional to 1,276.81, 1,914.61 and 583.28 is: 874.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.81 : 1,914.61 = 583.28 : x
  2. Step 2: Convert to fraction form
    1,276.81/1,914.61 = 583.28/x
  3. Step 3: Cross multiply
    1,276.81x = 1,914.61 × 583.28
  4. Step 4: Simplify right side
    1,276.81x = 1,116,747.22
  5. Step 5: Solve for x
    x = 1,116,747.22/1,276.81
  6. Step 6: Final answer
    x = 874.64

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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.