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Finding the Fourth Proportional to 1,568.03, 2,163.98 and 869.45

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Solution

The fourth proportional to 1,568.03, 2,163.98 and 869.45 is: 1,199.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,568.03 : 2,163.98 = 869.45 : x
  2. Step 2: Convert to fraction form
    1,568.03/2,163.98 = 869.45/x
  3. Step 3: Cross multiply
    1,568.03x = 2,163.98 × 869.45
  4. Step 4: Simplify right side
    1,568.03x = 1,881,472.41
  5. Step 5: Solve for x
    x = 1,881,472.41/1,568.03
  6. Step 6: Final answer
    x = 1,199.90

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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.