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Finding the Fourth Proportional to 1,490.50, 2,234.93 and 669.58

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Solution

The fourth proportional to 1,490.50, 2,234.93 and 669.58 is: 1,004.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.50 : 2,234.93 = 669.58 : x
  2. Step 2: Convert to fraction form
    1,490.50/2,234.93 = 669.58/x
  3. Step 3: Cross multiply
    1,490.50x = 2,234.93 × 669.58
  4. Step 4: Simplify right side
    1,490.50x = 1,496,464.43
  5. Step 5: Solve for x
    x = 1,496,464.43/1,490.50
  6. Step 6: Final answer
    x = 1,004.00

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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.