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Finding the Fourth Proportional to 1,570.24, 2,355.93 and 645.54

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Solution

The fourth proportional to 1,570.24, 2,355.93 and 645.54 is: 968.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.24 : 2,355.93 = 645.54 : x
  2. Step 2: Convert to fraction form
    1,570.24/2,355.93 = 645.54/x
  3. Step 3: Cross multiply
    1,570.24x = 2,355.93 × 645.54
  4. Step 4: Simplify right side
    1,570.24x = 1,520,847.05
  5. Step 5: Solve for x
    x = 1,520,847.05/1,570.24
  6. Step 6: Final answer
    x = 968.54

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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.