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Finding the Fourth Proportional to 718.83, 992.08 and 439.01

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Solution

The fourth proportional to 718.83, 992.08 and 439.01 is: 605.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.83 : 992.08 = 439.01 : x
  2. Step 2: Convert to fraction form
    718.83/992.08 = 439.01/x
  3. Step 3: Cross multiply
    718.83x = 992.08 × 439.01
  4. Step 4: Simplify right side
    718.83x = 435,532.04
  5. Step 5: Solve for x
    x = 435,532.04/718.83
  6. Step 6: Final answer
    x = 605.89

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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.