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Finding the Fourth Proportional to 1,328.45, 1,992.55 and 451.03

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Solution

The fourth proportional to 1,328.45, 1,992.55 and 451.03 is: 676.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.45 : 1,992.55 = 451.03 : x
  2. Step 2: Convert to fraction form
    1,328.45/1,992.55 = 451.03/x
  3. Step 3: Cross multiply
    1,328.45x = 1,992.55 × 451.03
  4. Step 4: Simplify right side
    1,328.45x = 898,699.83
  5. Step 5: Solve for x
    x = 898,699.83/1,328.45
  6. Step 6: Final answer
    x = 676.50

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.