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Finding the Fourth Proportional to 1,133.94, 1,697.61 and 663.99

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Solution

The fourth proportional to 1,133.94, 1,697.61 and 663.99 is: 994.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,133.94 : 1,697.61 = 663.99 : x
  2. Step 2: Convert to fraction form
    1,133.94/1,697.61 = 663.99/x
  3. Step 3: Cross multiply
    1,133.94x = 1,697.61 × 663.99
  4. Step 4: Simplify right side
    1,133.94x = 1,127,196.06
  5. Step 5: Solve for x
    x = 1,127,196.06/1,133.94
  6. Step 6: Final answer
    x = 994.05

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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.