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Finding the Fourth Proportional to 719.30, 992.59 and 404.53

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Solution

The fourth proportional to 719.30, 992.59 and 404.53 is: 558.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.30 : 992.59 = 404.53 : x
  2. Step 2: Convert to fraction form
    719.30/992.59 = 404.53/x
  3. Step 3: Cross multiply
    719.30x = 992.59 × 404.53
  4. Step 4: Simplify right side
    719.30x = 401,528.94
  5. Step 5: Solve for x
    x = 401,528.94/719.30
  6. Step 6: Final answer
    x = 558.22

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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.