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Finding the Fourth Proportional to 1,805.42, 2,705.96 and 649.82

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Solution

The fourth proportional to 1,805.42, 2,705.96 and 649.82 is: 973.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.42 : 2,705.96 = 649.82 : x
  2. Step 2: Convert to fraction form
    1,805.42/2,705.96 = 649.82/x
  3. Step 3: Cross multiply
    1,805.42x = 2,705.96 × 649.82
  4. Step 4: Simplify right side
    1,805.42x = 1,758,386.93
  5. Step 5: Solve for x
    x = 1,758,386.93/1,805.42
  6. Step 6: Final answer
    x = 973.95

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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.