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Finding the Fourth Proportional to 712.21, 1,068.72 and 581.94

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Solution

The fourth proportional to 712.21, 1,068.72 and 581.94 is: 873.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.21 : 1,068.72 = 581.94 : x
  2. Step 2: Convert to fraction form
    712.21/1,068.72 = 581.94/x
  3. Step 3: Cross multiply
    712.21x = 1,068.72 × 581.94
  4. Step 4: Simplify right side
    712.21x = 621,930.92
  5. Step 5: Solve for x
    x = 621,930.92/712.21
  6. Step 6: Final answer
    x = 873.24

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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.