Home / 1,181.91-1,631.48-1,015.45

Finding the Fourth Proportional to 1,181.91, 1,631.48 and 1,015.45

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Solution

The fourth proportional to 1,181.91, 1,631.48 and 1,015.45 is: 1,401.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.91 : 1,631.48 = 1,015.45 : x
  2. Step 2: Convert to fraction form
    1,181.91/1,631.48 = 1,015.45/x
  3. Step 3: Cross multiply
    1,181.91x = 1,631.48 × 1,015.45
  4. Step 4: Simplify right side
    1,181.91x = 1,656,686.37
  5. Step 5: Solve for x
    x = 1,656,686.37/1,181.91
  6. Step 6: Final answer
    x = 1,401.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.