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Finding the Fourth Proportional to 941.42, 1,297.49 and 719.96

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Solution

The fourth proportional to 941.42, 1,297.49 and 719.96 is: 992.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.42 : 1,297.49 = 719.96 : x
  2. Step 2: Convert to fraction form
    941.42/1,297.49 = 719.96/x
  3. Step 3: Cross multiply
    941.42x = 1,297.49 × 719.96
  4. Step 4: Simplify right side
    941.42x = 934,130.81
  5. Step 5: Solve for x
    x = 934,130.81/941.42
  6. Step 6: Final answer
    x = 992.25

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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.