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Finding the Fourth Proportional to 990.95, 1,487.35 and 504.37

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Solution

The fourth proportional to 990.95, 1,487.35 and 504.37 is: 757.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.95 : 1,487.35 = 504.37 : x
  2. Step 2: Convert to fraction form
    990.95/1,487.35 = 504.37/x
  3. Step 3: Cross multiply
    990.95x = 1,487.35 × 504.37
  4. Step 4: Simplify right side
    990.95x = 750,171.63
  5. Step 5: Solve for x
    x = 750,171.63/990.95
  6. Step 6: Final answer
    x = 757.02

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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.