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Finding the Fourth Proportional to 1,567.50, 2,163.70 and 1,043.70

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Solution

The fourth proportional to 1,567.50, 2,163.70 and 1,043.70 is: 1,440.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,567.50 : 2,163.70 = 1,043.70 : x
  2. Step 2: Convert to fraction form
    1,567.50/2,163.70 = 1,043.70/x
  3. Step 3: Cross multiply
    1,567.50x = 2,163.70 × 1,043.70
  4. Step 4: Simplify right side
    1,567.50x = 2,258,253.69
  5. Step 5: Solve for x
    x = 2,258,253.69/1,567.50
  6. Step 6: Final answer
    x = 1,440.67

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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.