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Finding the Fourth Proportional to 670.19, 998.16 and 660.08

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Solution

The fourth proportional to 670.19, 998.16 and 660.08 is: 983.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.19 : 998.16 = 660.08 : x
  2. Step 2: Convert to fraction form
    670.19/998.16 = 660.08/x
  3. Step 3: Cross multiply
    670.19x = 998.16 × 660.08
  4. Step 4: Simplify right side
    670.19x = 658,862.15
  5. Step 5: Solve for x
    x = 658,862.15/670.19
  6. Step 6: Final answer
    x = 983.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.