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Finding the Fourth Proportional to 485.04, 668.84 and 310.08

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Solution

The fourth proportional to 485.04, 668.84 and 310.08 is: 427.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.04 : 668.84 = 310.08 : x
  2. Step 2: Convert to fraction form
    485.04/668.84 = 310.08/x
  3. Step 3: Cross multiply
    485.04x = 668.84 × 310.08
  4. Step 4: Simplify right side
    485.04x = 207,393.91
  5. Step 5: Solve for x
    x = 207,393.91/485.04
  6. Step 6: Final answer
    x = 427.58

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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.