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Finding the Fourth Proportional to 1,619.52, 2,428.98 and 465

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Solution

The fourth proportional to 1,619.52, 2,428.98 and 465 is: 697.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.52 : 2,428.98 = 465 : x
  2. Step 2: Convert to fraction form
    1,619.52/2,428.98 = 465/x
  3. Step 3: Cross multiply
    1,619.52x = 2,428.98 × 465
  4. Step 4: Simplify right side
    1,619.52x = 1,129,475.70
  5. Step 5: Solve for x
    x = 1,129,475.70/1,619.52
  6. Step 6: Final answer
    x = 697.41

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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.