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Finding the Fourth Proportional to 1,051.66, 1,451.43 and 757.90

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Solution

The fourth proportional to 1,051.66, 1,451.43 and 757.90 is: 1,046.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.66 : 1,451.43 = 757.90 : x
  2. Step 2: Convert to fraction form
    1,051.66/1,451.43 = 757.90/x
  3. Step 3: Cross multiply
    1,051.66x = 1,451.43 × 757.90
  4. Step 4: Simplify right side
    1,051.66x = 1,100,038.80
  5. Step 5: Solve for x
    x = 1,100,038.80/1,051.66
  6. Step 6: Final answer
    x = 1,046.00

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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.