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Finding the Fourth Proportional to 962.13, 1,442.34 and 816.81

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Solution

The fourth proportional to 962.13, 1,442.34 and 816.81 is: 1,224.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.13 : 1,442.34 = 816.81 : x
  2. Step 2: Convert to fraction form
    962.13/1,442.34 = 816.81/x
  3. Step 3: Cross multiply
    962.13x = 1,442.34 × 816.81
  4. Step 4: Simplify right side
    962.13x = 1,178,117.74
  5. Step 5: Solve for x
    x = 1,178,117.74/962.13
  6. Step 6: Final answer
    x = 1,224.49

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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.