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Finding the Fourth Proportional to 1,409.32, 1,944.87 and 788.32

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Solution

The fourth proportional to 1,409.32, 1,944.87 and 788.32 is: 1,087.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.32 : 1,944.87 = 788.32 : x
  2. Step 2: Convert to fraction form
    1,409.32/1,944.87 = 788.32/x
  3. Step 3: Cross multiply
    1,409.32x = 1,944.87 × 788.32
  4. Step 4: Simplify right side
    1,409.32x = 1,533,179.92
  5. Step 5: Solve for x
    x = 1,533,179.92/1,409.32
  6. Step 6: Final answer
    x = 1,087.89

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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.