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Finding the Fourth Proportional to 884.06, 1,325.79 and 390.32

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Solution

The fourth proportional to 884.06, 1,325.79 and 390.32 is: 585.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.06 : 1,325.79 = 390.32 : x
  2. Step 2: Convert to fraction form
    884.06/1,325.79 = 390.32/x
  3. Step 3: Cross multiply
    884.06x = 1,325.79 × 390.32
  4. Step 4: Simplify right side
    884.06x = 517,475.72
  5. Step 5: Solve for x
    x = 517,475.72/884.06
  6. Step 6: Final answer
    x = 585.34

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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.