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Finding the Fourth Proportional to 673.85, 928.62 and 486.99

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Solution

The fourth proportional to 673.85, 928.62 and 486.99 is: 671.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.85 : 928.62 = 486.99 : x
  2. Step 2: Convert to fraction form
    673.85/928.62 = 486.99/x
  3. Step 3: Cross multiply
    673.85x = 928.62 × 486.99
  4. Step 4: Simplify right side
    673.85x = 452,228.65
  5. Step 5: Solve for x
    x = 452,228.65/673.85
  6. Step 6: Final answer
    x = 671.12

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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.