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Finding the Fourth Proportional to 977.21, 1,348.73 and 584.27

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Solution

The fourth proportional to 977.21, 1,348.73 and 584.27 is: 806.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.21 : 1,348.73 = 584.27 : x
  2. Step 2: Convert to fraction form
    977.21/1,348.73 = 584.27/x
  3. Step 3: Cross multiply
    977.21x = 1,348.73 × 584.27
  4. Step 4: Simplify right side
    977.21x = 788,019.56
  5. Step 5: Solve for x
    x = 788,019.56/977.21
  6. Step 6: Final answer
    x = 806.40

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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.