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Finding the Fourth Proportional to 1,060.21, 1,462.81 and 640.79

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Solution

The fourth proportional to 1,060.21, 1,462.81 and 640.79 is: 884.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,060.21 : 1,462.81 = 640.79 : x
  2. Step 2: Convert to fraction form
    1,060.21/1,462.81 = 640.79/x
  3. Step 3: Cross multiply
    1,060.21x = 1,462.81 × 640.79
  4. Step 4: Simplify right side
    1,060.21x = 937,360.02
  5. Step 5: Solve for x
    x = 937,360.02/1,060.21
  6. Step 6: Final answer
    x = 884.13

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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.