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Finding the Fourth Proportional to 2,379.96, 3,569.84 and 648.64

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Solution

The fourth proportional to 2,379.96, 3,569.84 and 648.64 is: 972.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.96 : 3,569.84 = 648.64 : x
  2. Step 2: Convert to fraction form
    2,379.96/3,569.84 = 648.64/x
  3. Step 3: Cross multiply
    2,379.96x = 3,569.84 × 648.64
  4. Step 4: Simplify right side
    2,379.96x = 2,315,541.02
  5. Step 5: Solve for x
    x = 2,315,541.02/2,379.96
  6. Step 6: Final answer
    x = 972.93

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1.5x scale

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.