Home / 1,425.18-2,134.64-693.20

Finding the Fourth Proportional to 1,425.18, 2,134.64 and 693.20

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Solution

The fourth proportional to 1,425.18, 2,134.64 and 693.20 is: 1,038.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.18 : 2,134.64 = 693.20 : x
  2. Step 2: Convert to fraction form
    1,425.18/2,134.64 = 693.20/x
  3. Step 3: Cross multiply
    1,425.18x = 2,134.64 × 693.20
  4. Step 4: Simplify right side
    1,425.18x = 1,479,732.45
  5. Step 5: Solve for x
    x = 1,479,732.45/1,425.18
  6. Step 6: Final answer
    x = 1,038.28

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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.