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Finding the Fourth Proportional to 485.77, 729.16 and 303.29

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Solution

The fourth proportional to 485.77, 729.16 and 303.29 is: 455.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.77 : 729.16 = 303.29 : x
  2. Step 2: Convert to fraction form
    485.77/729.16 = 303.29/x
  3. Step 3: Cross multiply
    485.77x = 729.16 × 303.29
  4. Step 4: Simplify right side
    485.77x = 221,146.94
  5. Step 5: Solve for x
    x = 221,146.94/485.77
  6. Step 6: Final answer
    x = 455.25

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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.