Home / 1,423.40-2,134.38-435.92

Finding the Fourth Proportional to 1,423.40, 2,134.38 and 435.92

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Solution

The fourth proportional to 1,423.40, 2,134.38 and 435.92 is: 653.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.40 : 2,134.38 = 435.92 : x
  2. Step 2: Convert to fraction form
    1,423.40/2,134.38 = 435.92/x
  3. Step 3: Cross multiply
    1,423.40x = 2,134.38 × 435.92
  4. Step 4: Simplify right side
    1,423.40x = 930,418.93
  5. Step 5: Solve for x
    x = 930,418.93/1,423.40
  6. Step 6: Final answer
    x = 653.66

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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.