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Finding the Fourth Proportional to 1,119.03, 1,678.58 and 297.30

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Solution

The fourth proportional to 1,119.03, 1,678.58 and 297.30 is: 445.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.03 : 1,678.58 = 297.30 : x
  2. Step 2: Convert to fraction form
    1,119.03/1,678.58 = 297.30/x
  3. Step 3: Cross multiply
    1,119.03x = 1,678.58 × 297.30
  4. Step 4: Simplify right side
    1,119.03x = 499,044.43
  5. Step 5: Solve for x
    x = 499,044.43/1,119.03
  6. Step 6: Final answer
    x = 445.96

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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.