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Finding the Fourth Proportional to 1,649.72, 2,276.54 and 986.94

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Solution

The fourth proportional to 1,649.72, 2,276.54 and 986.94 is: 1,361.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,649.72 : 2,276.54 = 986.94 : x
  2. Step 2: Convert to fraction form
    1,649.72/2,276.54 = 986.94/x
  3. Step 3: Cross multiply
    1,649.72x = 2,276.54 × 986.94
  4. Step 4: Simplify right side
    1,649.72x = 2,246,810.85
  5. Step 5: Solve for x
    x = 2,246,810.85/1,649.72
  6. Step 6: Final answer
    x = 1,361.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.