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Finding the Fourth Proportional to 1,569.21, 2,353.42 and 645.03

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Solution

The fourth proportional to 1,569.21, 2,353.42 and 645.03 is: 967.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,569.21 : 2,353.42 = 645.03 : x
  2. Step 2: Convert to fraction form
    1,569.21/2,353.42 = 645.03/x
  3. Step 3: Cross multiply
    1,569.21x = 2,353.42 × 645.03
  4. Step 4: Simplify right side
    1,569.21x = 1,518,014.74
  5. Step 5: Solve for x
    x = 1,518,014.74/1,569.21
  6. Step 6: Final answer
    x = 967.38

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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.