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Finding the Fourth Proportional to 936.05, 1,395.82 and 890.07

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Solution

The fourth proportional to 936.05, 1,395.82 and 890.07 is: 1,327.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.05 : 1,395.82 = 890.07 : x
  2. Step 2: Convert to fraction form
    936.05/1,395.82 = 890.07/x
  3. Step 3: Cross multiply
    936.05x = 1,395.82 × 890.07
  4. Step 4: Simplify right side
    936.05x = 1,242,377.67
  5. Step 5: Solve for x
    x = 1,242,377.67/936.05
  6. Step 6: Final answer
    x = 1,327.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.