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Finding the Fourth Proportional to 1,137.29, 1,705.89 and 357.28

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Solution

The fourth proportional to 1,137.29, 1,705.89 and 357.28 is: 535.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137.29 : 1,705.89 = 357.28 : x
  2. Step 2: Convert to fraction form
    1,137.29/1,705.89 = 357.28/x
  3. Step 3: Cross multiply
    1,137.29x = 1,705.89 × 357.28
  4. Step 4: Simplify right side
    1,137.29x = 609,480.38
  5. Step 5: Solve for x
    x = 609,480.38/1,137.29
  6. Step 6: Final answer
    x = 535.91

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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.