Home / 3,521.51-5,280.63-1,299.78

Finding the Fourth Proportional to 3,521.51, 5,280.63 and 1,299.78

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Solution

The fourth proportional to 3,521.51, 5,280.63 and 1,299.78 is: 1,949.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,521.51 : 5,280.63 = 1,299.78 : x
  2. Step 2: Convert to fraction form
    3,521.51/5,280.63 = 1,299.78/x
  3. Step 3: Cross multiply
    3,521.51x = 5,280.63 × 1,299.78
  4. Step 4: Simplify right side
    3,521.51x = 6,863,657.26
  5. Step 5: Solve for x
    x = 6,863,657.26/3,521.51
  6. Step 6: Final answer
    x = 1,949.07

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.