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Finding the Fourth Proportional to 988.87, 1,483.32 and 577.73

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Solution

The fourth proportional to 988.87, 1,483.32 and 577.73 is: 866.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.87 : 1,483.32 = 577.73 : x
  2. Step 2: Convert to fraction form
    988.87/1,483.32 = 577.73/x
  3. Step 3: Cross multiply
    988.87x = 1,483.32 × 577.73
  4. Step 4: Simplify right side
    988.87x = 856,958.46
  5. Step 5: Solve for x
    x = 856,958.46/988.87
  6. Step 6: Final answer
    x = 866.60

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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.