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Finding the Fourth Proportional to 852.76, 1,173.99 and 765.28

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Solution

The fourth proportional to 852.76, 1,173.99 and 765.28 is: 1,053.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.76 : 1,173.99 = 765.28 : x
  2. Step 2: Convert to fraction form
    852.76/1,173.99 = 765.28/x
  3. Step 3: Cross multiply
    852.76x = 1,173.99 × 765.28
  4. Step 4: Simplify right side
    852.76x = 898,431.07
  5. Step 5: Solve for x
    x = 898,431.07/852.76
  6. Step 6: Final answer
    x = 1,053.56

Related Problems

Find fourth proportional to 426.38, 587.00 and 382.64
Half scale
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Double scale
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1.5x scale

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.