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Finding the Fourth Proportional to 1,725.98, 2,588.94 and 427.45

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Solution

The fourth proportional to 1,725.98, 2,588.94 and 427.45 is: 641.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.98 : 2,588.94 = 427.45 : x
  2. Step 2: Convert to fraction form
    1,725.98/2,588.94 = 427.45/x
  3. Step 3: Cross multiply
    1,725.98x = 2,588.94 × 427.45
  4. Step 4: Simplify right side
    1,725.98x = 1,106,629.46
  5. Step 5: Solve for x
    x = 1,106,629.46/1,725.98
  6. Step 6: Final answer
    x = 641.16

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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.