Home / 3,507.49-5,260.74-1,428.40

Finding the Fourth Proportional to 3,507.49, 5,260.74 and 1,428.40

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Solution

The fourth proportional to 3,507.49, 5,260.74 and 1,428.40 is: 2,142.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,507.49 : 5,260.74 = 1,428.40 : x
  2. Step 2: Convert to fraction form
    3,507.49/5,260.74 = 1,428.40/x
  3. Step 3: Cross multiply
    3,507.49x = 5,260.74 × 1,428.40
  4. Step 4: Simplify right side
    3,507.49x = 7,514,441.02
  5. Step 5: Solve for x
    x = 7,514,441.02/3,507.49
  6. Step 6: Final answer
    x = 2,142.40

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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.