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Finding the Fourth Proportional to 759.94, 1,140.39 and 435.94

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Solution

The fourth proportional to 759.94, 1,140.39 and 435.94 is: 654.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.94 : 1,140.39 = 435.94 : x
  2. Step 2: Convert to fraction form
    759.94/1,140.39 = 435.94/x
  3. Step 3: Cross multiply
    759.94x = 1,140.39 × 435.94
  4. Step 4: Simplify right side
    759.94x = 497,141.62
  5. Step 5: Solve for x
    x = 497,141.62/759.94
  6. Step 6: Final answer
    x = 654.19

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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.