Home / 1,423.58-2,135.37-397.50

Finding the Fourth Proportional to 1,423.58, 2,135.37 and 397.50

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Solution

The fourth proportional to 1,423.58, 2,135.37 and 397.50 is: 596.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.58 : 2,135.37 = 397.50 : x
  2. Step 2: Convert to fraction form
    1,423.58/2,135.37 = 397.50/x
  3. Step 3: Cross multiply
    1,423.58x = 2,135.37 × 397.50
  4. Step 4: Simplify right side
    1,423.58x = 848,809.58
  5. Step 5: Solve for x
    x = 848,809.58/1,423.58
  6. Step 6: Final answer
    x = 596.25

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Double scale
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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.