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Finding the Fourth Proportional to 852.99, 1,278.67 and 487.07

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Solution

The fourth proportional to 852.99, 1,278.67 and 487.07 is: 730.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.99 : 1,278.67 = 487.07 : x
  2. Step 2: Convert to fraction form
    852.99/1,278.67 = 487.07/x
  3. Step 3: Cross multiply
    852.99x = 1,278.67 × 487.07
  4. Step 4: Simplify right side
    852.99x = 622,799.36
  5. Step 5: Solve for x
    x = 622,799.36/852.99
  6. Step 6: Final answer
    x = 730.14

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Double scale
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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.