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Finding the Fourth Proportional to 558.49, 769.75 and 483.65

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Solution

The fourth proportional to 558.49, 769.75 and 483.65 is: 666.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.49 : 769.75 = 483.65 : x
  2. Step 2: Convert to fraction form
    558.49/769.75 = 483.65/x
  3. Step 3: Cross multiply
    558.49x = 769.75 × 483.65
  4. Step 4: Simplify right side
    558.49x = 372,289.59
  5. Step 5: Solve for x
    x = 372,289.59/558.49
  6. Step 6: Final answer
    x = 666.60

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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.