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Finding the Fourth Proportional to 1,568.81, 2,353.64 and 645.02

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Solution

The fourth proportional to 1,568.81, 2,353.64 and 645.02 is: 967.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,568.81 : 2,353.64 = 645.02 : x
  2. Step 2: Convert to fraction form
    1,568.81/2,353.64 = 645.02/x
  3. Step 3: Cross multiply
    1,568.81x = 2,353.64 × 645.02
  4. Step 4: Simplify right side
    1,568.81x = 1,518,144.87
  5. Step 5: Solve for x
    x = 1,518,144.87/1,568.81
  6. Step 6: Final answer
    x = 967.71

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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.