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Finding the Fourth Proportional to 670.99, 1,006.63 and 208.82

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Solution

The fourth proportional to 670.99, 1,006.63 and 208.82 is: 313.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.99 : 1,006.63 = 208.82 : x
  2. Step 2: Convert to fraction form
    670.99/1,006.63 = 208.82/x
  3. Step 3: Cross multiply
    670.99x = 1,006.63 × 208.82
  4. Step 4: Simplify right side
    670.99x = 210,204.48
  5. Step 5: Solve for x
    x = 210,204.48/670.99
  6. Step 6: Final answer
    x = 313.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.