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Finding the Fourth Proportional to 1,479.60, 2,041.82 and 816.45

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Solution

The fourth proportional to 1,479.60, 2,041.82 and 816.45 is: 1,126.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.60 : 2,041.82 = 816.45 : x
  2. Step 2: Convert to fraction form
    1,479.60/2,041.82 = 816.45/x
  3. Step 3: Cross multiply
    1,479.60x = 2,041.82 × 816.45
  4. Step 4: Simplify right side
    1,479.60x = 1,667,029.65
  5. Step 5: Solve for x
    x = 1,667,029.65/1,479.60
  6. Step 6: Final answer
    x = 1,126.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.