Home / 3,410.87-4,707-1,918.76

Finding the Fourth Proportional to 3,410.87, 4,707 and 1,918.76

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Solution

The fourth proportional to 3,410.87, 4,707 and 1,918.76 is: 2,647.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,410.87 : 4,707 = 1,918.76 : x
  2. Step 2: Convert to fraction form
    3,410.87/4,707 = 1,918.76/x
  3. Step 3: Cross multiply
    3,410.87x = 4,707 × 1,918.76
  4. Step 4: Simplify right side
    3,410.87x = 9,031,579.79
  5. Step 5: Solve for x
    x = 9,031,579.79/3,410.87
  6. Step 6: Final answer
    x = 2,647.89

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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.