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Finding the Fourth Proportional to 1,290.52, 1,935.90 and 366.09

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Solution

The fourth proportional to 1,290.52, 1,935.90 and 366.09 is: 549.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.52 : 1,935.90 = 366.09 : x
  2. Step 2: Convert to fraction form
    1,290.52/1,935.90 = 366.09/x
  3. Step 3: Cross multiply
    1,290.52x = 1,935.90 × 366.09
  4. Step 4: Simplify right side
    1,290.52x = 708,713.63
  5. Step 5: Solve for x
    x = 708,713.63/1,290.52
  6. Step 6: Final answer
    x = 549.17

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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.