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Finding the Fourth Proportional to 993.18, 1,487.82 and 559.02

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Solution

The fourth proportional to 993.18, 1,487.82 and 559.02 is: 837.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.18 : 1,487.82 = 559.02 : x
  2. Step 2: Convert to fraction form
    993.18/1,487.82 = 559.02/x
  3. Step 3: Cross multiply
    993.18x = 1,487.82 × 559.02
  4. Step 4: Simplify right side
    993.18x = 831,721.14
  5. Step 5: Solve for x
    x = 831,721.14/993.18
  6. Step 6: Final answer
    x = 837.43

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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.