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Finding the Fourth Proportional to 485.15, 728.22 and 302.67

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Solution

The fourth proportional to 485.15, 728.22 and 302.67 is: 454.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.15 : 728.22 = 302.67 : x
  2. Step 2: Convert to fraction form
    485.15/728.22 = 302.67/x
  3. Step 3: Cross multiply
    485.15x = 728.22 × 302.67
  4. Step 4: Simplify right side
    485.15x = 220,406.71
  5. Step 5: Solve for x
    x = 220,406.71/485.15
  6. Step 6: Final answer
    x = 454.31

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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.