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Finding the Fourth Proportional to 718.98, 992.01 and 486.06

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Solution

The fourth proportional to 718.98, 992.01 and 486.06 is: 670.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.98 : 992.01 = 486.06 : x
  2. Step 2: Convert to fraction form
    718.98/992.01 = 486.06/x
  3. Step 3: Cross multiply
    718.98x = 992.01 × 486.06
  4. Step 4: Simplify right side
    718.98x = 482,176.38
  5. Step 5: Solve for x
    x = 482,176.38/718.98
  6. Step 6: Final answer
    x = 670.64

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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.