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Finding the Fourth Proportional to 1,228.40, 1,840.08 and 650

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Solution

The fourth proportional to 1,228.40, 1,840.08 and 650 is: 973.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.40 : 1,840.08 = 650 : x
  2. Step 2: Convert to fraction form
    1,228.40/1,840.08 = 650/x
  3. Step 3: Cross multiply
    1,228.40x = 1,840.08 × 650
  4. Step 4: Simplify right side
    1,228.40x = 1,196,052
  5. Step 5: Solve for x
    x = 1,196,052/1,228.40
  6. Step 6: Final answer
    x = 973.67

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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.