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Finding the Fourth Proportional to 983.58, 1,474.91 and 572.84

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Solution

The fourth proportional to 983.58, 1,474.91 and 572.84 is: 858.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.58 : 1,474.91 = 572.84 : x
  2. Step 2: Convert to fraction form
    983.58/1,474.91 = 572.84/x
  3. Step 3: Cross multiply
    983.58x = 1,474.91 × 572.84
  4. Step 4: Simplify right side
    983.58x = 844,884.88
  5. Step 5: Solve for x
    x = 844,884.88/983.58
  6. Step 6: Final answer
    x = 858.99

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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.