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Finding the Fourth Proportional to 1,425.28, 2,137.88 and 603.34

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Solution

The fourth proportional to 1,425.28, 2,137.88 and 603.34 is: 904.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.28 : 2,137.88 = 603.34 : x
  2. Step 2: Convert to fraction form
    1,425.28/2,137.88 = 603.34/x
  3. Step 3: Cross multiply
    1,425.28x = 2,137.88 × 603.34
  4. Step 4: Simplify right side
    1,425.28x = 1,289,868.52
  5. Step 5: Solve for x
    x = 1,289,868.52/1,425.28
  6. Step 6: Final answer
    x = 904.99

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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.