Home / 3,128.10-4,316.67-1,730.76

Finding the Fourth Proportional to 3,128.10, 4,316.67 and 1,730.76

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Solution

The fourth proportional to 3,128.10, 4,316.67 and 1,730.76 is: 2,388.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.10 : 4,316.67 = 1,730.76 : x
  2. Step 2: Convert to fraction form
    3,128.10/4,316.67 = 1,730.76/x
  3. Step 3: Cross multiply
    3,128.10x = 4,316.67 × 1,730.76
  4. Step 4: Simplify right side
    3,128.10x = 7,471,119.77
  5. Step 5: Solve for x
    x = 7,471,119.77/3,128.10
  6. Step 6: Final answer
    x = 2,388.39

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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.