Home / 1,259.97-1,890.27-438.26

Finding the Fourth Proportional to 1,259.97, 1,890.27 and 438.26

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Solution

The fourth proportional to 1,259.97, 1,890.27 and 438.26 is: 657.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259.97 : 1,890.27 = 438.26 : x
  2. Step 2: Convert to fraction form
    1,259.97/1,890.27 = 438.26/x
  3. Step 3: Cross multiply
    1,259.97x = 1,890.27 × 438.26
  4. Step 4: Simplify right side
    1,259.97x = 828,420.28
  5. Step 5: Solve for x
    x = 828,420.28/1,259.97
  6. Step 6: Final answer
    x = 657.49

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.