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Finding the Fourth Proportional to 2,190.61, 3,285.55 and 651.25

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Solution

The fourth proportional to 2,190.61, 3,285.55 and 651.25 is: 976.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.61 : 3,285.55 = 651.25 : x
  2. Step 2: Convert to fraction form
    2,190.61/3,285.55 = 651.25/x
  3. Step 3: Cross multiply
    2,190.61x = 3,285.55 × 651.25
  4. Step 4: Simplify right side
    2,190.61x = 2,139,714.44
  5. Step 5: Solve for x
    x = 2,139,714.44/2,190.61
  6. Step 6: Final answer
    x = 976.77

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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.