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Finding the Fourth Proportional to 942.48, 1,412.44 and 711.18

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Solution

The fourth proportional to 942.48, 1,412.44 and 711.18 is: 1,065.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.48 : 1,412.44 = 711.18 : x
  2. Step 2: Convert to fraction form
    942.48/1,412.44 = 711.18/x
  3. Step 3: Cross multiply
    942.48x = 1,412.44 × 711.18
  4. Step 4: Simplify right side
    942.48x = 1,004,499.08
  5. Step 5: Solve for x
    x = 1,004,499.08/942.48
  6. Step 6: Final answer
    x = 1,065.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.