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Finding the Fourth Proportional to 469.28, 702.76 and 427.67

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Solution

The fourth proportional to 469.28, 702.76 and 427.67 is: 640.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.28 : 702.76 = 427.67 : x
  2. Step 2: Convert to fraction form
    469.28/702.76 = 427.67/x
  3. Step 3: Cross multiply
    469.28x = 702.76 × 427.67
  4. Step 4: Simplify right side
    469.28x = 300,549.37
  5. Step 5: Solve for x
    x = 300,549.37/469.28
  6. Step 6: Final answer
    x = 640.45

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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.