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Finding the Fourth Proportional to 719.38, 992.19 and 608.68

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Solution

The fourth proportional to 719.38, 992.19 and 608.68 is: 839.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.38 : 992.19 = 608.68 : x
  2. Step 2: Convert to fraction form
    719.38/992.19 = 608.68/x
  3. Step 3: Cross multiply
    719.38x = 992.19 × 608.68
  4. Step 4: Simplify right side
    719.38x = 603,926.21
  5. Step 5: Solve for x
    x = 603,926.21/719.38
  6. Step 6: Final answer
    x = 839.51

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1.5x scale

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.