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Finding the Fourth Proportional to 1,816.30, 2,723.10 and 775.45

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Solution

The fourth proportional to 1,816.30, 2,723.10 and 775.45 is: 1,162.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,816.30 : 2,723.10 = 775.45 : x
  2. Step 2: Convert to fraction form
    1,816.30/2,723.10 = 775.45/x
  3. Step 3: Cross multiply
    1,816.30x = 2,723.10 × 775.45
  4. Step 4: Simplify right side
    1,816.30x = 2,111,627.90
  5. Step 5: Solve for x
    x = 2,111,627.90/1,816.30
  6. Step 6: Final answer
    x = 1,162.60

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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.