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Finding the Fourth Proportional to 1,157.94, 1,737.42 and 427.35

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Solution

The fourth proportional to 1,157.94, 1,737.42 and 427.35 is: 641.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.94 : 1,737.42 = 427.35 : x
  2. Step 2: Convert to fraction form
    1,157.94/1,737.42 = 427.35/x
  3. Step 3: Cross multiply
    1,157.94x = 1,737.42 × 427.35
  4. Step 4: Simplify right side
    1,157.94x = 742,486.44
  5. Step 5: Solve for x
    x = 742,486.44/1,157.94
  6. Step 6: Final answer
    x = 641.21

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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.