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Finding the Fourth Proportional to 628.05, 866.70 and 366.06

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Solution

The fourth proportional to 628.05, 866.70 and 366.06 is: 505.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.05 : 866.70 = 366.06 : x
  2. Step 2: Convert to fraction form
    628.05/866.70 = 366.06/x
  3. Step 3: Cross multiply
    628.05x = 866.70 × 366.06
  4. Step 4: Simplify right side
    628.05x = 317,264.20
  5. Step 5: Solve for x
    x = 317,264.20/628.05
  6. Step 6: Final answer
    x = 505.16

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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.