Home / 1,299.70-1,795.59-1,089.50

Finding the Fourth Proportional to 1,299.70, 1,795.59 and 1,089.50

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Solution

The fourth proportional to 1,299.70, 1,795.59 and 1,089.50 is: 1,505.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.70 : 1,795.59 = 1,089.50 : x
  2. Step 2: Convert to fraction form
    1,299.70/1,795.59 = 1,089.50/x
  3. Step 3: Cross multiply
    1,299.70x = 1,795.59 × 1,089.50
  4. Step 4: Simplify right side
    1,299.70x = 1,956,299.49
  5. Step 5: Solve for x
    x = 1,956,299.49/1,299.70
  6. Step 6: Final answer
    x = 1,505.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.