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Finding the Fourth Proportional to 654.16, 902.88 and 486.64

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Solution

The fourth proportional to 654.16, 902.88 and 486.64 is: 671.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.16 : 902.88 = 486.64 : x
  2. Step 2: Convert to fraction form
    654.16/902.88 = 486.64/x
  3. Step 3: Cross multiply
    654.16x = 902.88 × 486.64
  4. Step 4: Simplify right side
    654.16x = 439,377.52
  5. Step 5: Solve for x
    x = 439,377.52/654.16
  6. Step 6: Final answer
    x = 671.67

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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.