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Finding the Fourth Proportional to 1,114.89, 1,670.46 and 384.06

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Solution

The fourth proportional to 1,114.89, 1,670.46 and 384.06 is: 575.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.89 : 1,670.46 = 384.06 : x
  2. Step 2: Convert to fraction form
    1,114.89/1,670.46 = 384.06/x
  3. Step 3: Cross multiply
    1,114.89x = 1,670.46 × 384.06
  4. Step 4: Simplify right side
    1,114.89x = 641,556.87
  5. Step 5: Solve for x
    x = 641,556.87/1,114.89
  6. Step 6: Final answer
    x = 575.44

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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.