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Finding the Fourth Proportional to 1,100.64, 1,647.02 and 956.09

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Solution

The fourth proportional to 1,100.64, 1,647.02 and 956.09 is: 1,430.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.64 : 1,647.02 = 956.09 : x
  2. Step 2: Convert to fraction form
    1,100.64/1,647.02 = 956.09/x
  3. Step 3: Cross multiply
    1,100.64x = 1,647.02 × 956.09
  4. Step 4: Simplify right side
    1,100.64x = 1,574,692.84
  5. Step 5: Solve for x
    x = 1,574,692.84/1,100.64
  6. Step 6: Final answer
    x = 1,430.71

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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.