Home / 2,509.36-3,462.68-1,390.20

Finding the Fourth Proportional to 2,509.36, 3,462.68 and 1,390.20

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Solution

The fourth proportional to 2,509.36, 3,462.68 and 1,390.20 is: 1,918.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,509.36 : 3,462.68 = 1,390.20 : x
  2. Step 2: Convert to fraction form
    2,509.36/3,462.68 = 1,390.20/x
  3. Step 3: Cross multiply
    2,509.36x = 3,462.68 × 1,390.20
  4. Step 4: Simplify right side
    2,509.36x = 4,813,808.23
  5. Step 5: Solve for x
    x = 4,813,808.23/2,509.36
  6. Step 6: Final answer
    x = 1,918.34

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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.