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Finding the Fourth Proportional to 1,383.82, 2,075.73 and 410.65

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Solution

The fourth proportional to 1,383.82, 2,075.73 and 410.65 is: 615.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.82 : 2,075.73 = 410.65 : x
  2. Step 2: Convert to fraction form
    1,383.82/2,075.73 = 410.65/x
  3. Step 3: Cross multiply
    1,383.82x = 2,075.73 × 410.65
  4. Step 4: Simplify right side
    1,383.82x = 852,398.52
  5. Step 5: Solve for x
    x = 852,398.52/1,383.82
  6. Step 6: Final answer
    x = 615.98

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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.