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Finding the Fourth Proportional to 1,408.75, 1,944.14 and 935.83

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Solution

The fourth proportional to 1,408.75, 1,944.14 and 935.83 is: 1,291.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.75 : 1,944.14 = 935.83 : x
  2. Step 2: Convert to fraction form
    1,408.75/1,944.14 = 935.83/x
  3. Step 3: Cross multiply
    1,408.75x = 1,944.14 × 935.83
  4. Step 4: Simplify right side
    1,408.75x = 1,819,384.54
  5. Step 5: Solve for x
    x = 1,819,384.54/1,408.75
  6. Step 6: Final answer
    x = 1,291.49

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Find fourth proportional to 704.38, 972.07 and 467.92
Half scale
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Double scale
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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.