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Finding the Fourth Proportional to 1,128.39, 1,692.33 and 572.54

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Solution

The fourth proportional to 1,128.39, 1,692.33 and 572.54 is: 858.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128.39 : 1,692.33 = 572.54 : x
  2. Step 2: Convert to fraction form
    1,128.39/1,692.33 = 572.54/x
  3. Step 3: Cross multiply
    1,128.39x = 1,692.33 × 572.54
  4. Step 4: Simplify right side
    1,128.39x = 968,918.16
  5. Step 5: Solve for x
    x = 968,918.16/1,128.39
  6. Step 6: Final answer
    x = 858.67

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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.