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Finding the Fourth Proportional to 484.55, 668.75 and 307.65

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Solution

The fourth proportional to 484.55, 668.75 and 307.65 is: 424.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.55 : 668.75 = 307.65 : x
  2. Step 2: Convert to fraction form
    484.55/668.75 = 307.65/x
  3. Step 3: Cross multiply
    484.55x = 668.75 × 307.65
  4. Step 4: Simplify right side
    484.55x = 205,739.40
  5. Step 5: Solve for x
    x = 205,739.40/484.55
  6. Step 6: Final answer
    x = 424.60

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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.