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Finding the Fourth Proportional to 488.99, 675.48 and 379.86

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Solution

The fourth proportional to 488.99, 675.48 and 379.86 is: 524.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.99 : 675.48 = 379.86 : x
  2. Step 2: Convert to fraction form
    488.99/675.48 = 379.86/x
  3. Step 3: Cross multiply
    488.99x = 675.48 × 379.86
  4. Step 4: Simplify right side
    488.99x = 256,587.83
  5. Step 5: Solve for x
    x = 256,587.83/488.99
  6. Step 6: Final answer
    x = 524.74

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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.