Home / 1,428.08-2,141.59-503.39

Finding the Fourth Proportional to 1,428.08, 2,141.59 and 503.39

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Solution

The fourth proportional to 1,428.08, 2,141.59 and 503.39 is: 754.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.08 : 2,141.59 = 503.39 : x
  2. Step 2: Convert to fraction form
    1,428.08/2,141.59 = 503.39/x
  3. Step 3: Cross multiply
    1,428.08x = 2,141.59 × 503.39
  4. Step 4: Simplify right side
    1,428.08x = 1,078,054.01
  5. Step 5: Solve for x
    x = 1,078,054.01/1,428.08
  6. Step 6: Final answer
    x = 754.90

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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.