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Finding the Fourth Proportional to 666.15, 999.23 and 628.35

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Solution

The fourth proportional to 666.15, 999.23 and 628.35 is: 942.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.15 : 999.23 = 628.35 : x
  2. Step 2: Convert to fraction form
    666.15/999.23 = 628.35/x
  3. Step 3: Cross multiply
    666.15x = 999.23 × 628.35
  4. Step 4: Simplify right side
    666.15x = 627,863.03
  5. Step 5: Solve for x
    x = 627,863.03/666.15
  6. Step 6: Final answer
    x = 942.53

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1.5x scale

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.