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Finding the Fourth Proportional to 689.00, 1,033.43 and 278.01

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Solution

The fourth proportional to 689.00, 1,033.43 and 278.01 is: 416.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.00 : 1,033.43 = 278.01 : x
  2. Step 2: Convert to fraction form
    689.00/1,033.43 = 278.01/x
  3. Step 3: Cross multiply
    689.00x = 1,033.43 × 278.01
  4. Step 4: Simplify right side
    689.00x = 287,302.48
  5. Step 5: Solve for x
    x = 287,302.48/689.00
  6. Step 6: Final answer
    x = 416.99

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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.