Home / 1,425.49-2,138.30-438.24

Finding the Fourth Proportional to 1,425.49, 2,138.30 and 438.24

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Solution

The fourth proportional to 1,425.49, 2,138.30 and 438.24 is: 657.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.49 : 2,138.30 = 438.24 : x
  2. Step 2: Convert to fraction form
    1,425.49/2,138.30 = 438.24/x
  3. Step 3: Cross multiply
    1,425.49x = 2,138.30 × 438.24
  4. Step 4: Simplify right side
    1,425.49x = 937,088.59
  5. Step 5: Solve for x
    x = 937,088.59/1,425.49
  6. Step 6: Final answer
    x = 657.38

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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.