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Finding the Fourth Proportional to 914.05, 1,370.64 and 394.03

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Solution

The fourth proportional to 914.05, 1,370.64 and 394.03 is: 590.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.05 : 1,370.64 = 394.03 : x
  2. Step 2: Convert to fraction form
    914.05/1,370.64 = 394.03/x
  3. Step 3: Cross multiply
    914.05x = 1,370.64 × 394.03
  4. Step 4: Simplify right side
    914.05x = 540,066.43
  5. Step 5: Solve for x
    x = 540,066.43/914.05
  6. Step 6: Final answer
    x = 590.85

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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.