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Finding the Fourth Proportional to 951.55, 1,313.08 and 620.06

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Solution

The fourth proportional to 951.55, 1,313.08 and 620.06 is: 855.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.55 : 1,313.08 = 620.06 : x
  2. Step 2: Convert to fraction form
    951.55/1,313.08 = 620.06/x
  3. Step 3: Cross multiply
    951.55x = 1,313.08 × 620.06
  4. Step 4: Simplify right side
    951.55x = 814,180.27
  5. Step 5: Solve for x
    x = 814,180.27/951.55
  6. Step 6: Final answer
    x = 855.64

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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.