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Finding the Fourth Proportional to 485.03, 663.56 and 483.66

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Solution

The fourth proportional to 485.03, 663.56 and 483.66 is: 661.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.03 : 663.56 = 483.66 : x
  2. Step 2: Convert to fraction form
    485.03/663.56 = 483.66/x
  3. Step 3: Cross multiply
    485.03x = 663.56 × 483.66
  4. Step 4: Simplify right side
    485.03x = 320,935.01
  5. Step 5: Solve for x
    x = 320,935.01/485.03
  6. Step 6: Final answer
    x = 661.69

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.