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Finding the Fourth Proportional to 662.51, 915.45 and 475.67

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Solution

The fourth proportional to 662.51, 915.45 and 475.67 is: 657.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.51 : 915.45 = 475.67 : x
  2. Step 2: Convert to fraction form
    662.51/915.45 = 475.67/x
  3. Step 3: Cross multiply
    662.51x = 915.45 × 475.67
  4. Step 4: Simplify right side
    662.51x = 435,452.10
  5. Step 5: Solve for x
    x = 435,452.10/662.51
  6. Step 6: Final answer
    x = 657.28

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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.