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Finding the Fourth Proportional to 1,424.50, 2,135.28 and 603.28

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Solution

The fourth proportional to 1,424.50, 2,135.28 and 603.28 is: 904.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.50 : 2,135.28 = 603.28 : x
  2. Step 2: Convert to fraction form
    1,424.50/2,135.28 = 603.28/x
  3. Step 3: Cross multiply
    1,424.50x = 2,135.28 × 603.28
  4. Step 4: Simplify right side
    1,424.50x = 1,288,171.72
  5. Step 5: Solve for x
    x = 1,288,171.72/1,424.50
  6. Step 6: Final answer
    x = 904.30

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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.