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Finding the Fourth Proportional to 1,133.56, 1,563.72 and 691.36

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Solution

The fourth proportional to 1,133.56, 1,563.72 and 691.36 is: 953.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,133.56 : 1,563.72 = 691.36 : x
  2. Step 2: Convert to fraction form
    1,133.56/1,563.72 = 691.36/x
  3. Step 3: Cross multiply
    1,133.56x = 1,563.72 × 691.36
  4. Step 4: Simplify right side
    1,133.56x = 1,081,093.46
  5. Step 5: Solve for x
    x = 1,081,093.46/1,133.56
  6. Step 6: Final answer
    x = 953.72

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1.5x scale

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.