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Finding the Fourth Proportional to 757.99, 1,045.90 and 426.40

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Solution

The fourth proportional to 757.99, 1,045.90 and 426.40 is: 588.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.99 : 1,045.90 = 426.40 : x
  2. Step 2: Convert to fraction form
    757.99/1,045.90 = 426.40/x
  3. Step 3: Cross multiply
    757.99x = 1,045.90 × 426.40
  4. Step 4: Simplify right side
    757.99x = 445,964.40
  5. Step 5: Solve for x
    x = 445,964.40/757.99
  6. Step 6: Final answer
    x = 588.35

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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.