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Finding the Fourth Proportional to 1,395.12, 1,927.80 and 1,327.64

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Solution

The fourth proportional to 1,395.12, 1,927.80 and 1,327.64 is: 1,834.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.12 : 1,927.80 = 1,327.64 : x
  2. Step 2: Convert to fraction form
    1,395.12/1,927.80 = 1,327.64/x
  3. Step 3: Cross multiply
    1,395.12x = 1,927.80 × 1,327.64
  4. Step 4: Simplify right side
    1,395.12x = 2,559,424.39
  5. Step 5: Solve for x
    x = 2,559,424.39/1,395.12
  6. Step 6: Final answer
    x = 1,834.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.