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Finding the Fourth Proportional to 828.26, 1,143.51 and 579.14

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Solution

The fourth proportional to 828.26, 1,143.51 and 579.14 is: 799.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.26 : 1,143.51 = 579.14 : x
  2. Step 2: Convert to fraction form
    828.26/1,143.51 = 579.14/x
  3. Step 3: Cross multiply
    828.26x = 1,143.51 × 579.14
  4. Step 4: Simplify right side
    828.26x = 662,252.38
  5. Step 5: Solve for x
    x = 662,252.38/828.26
  6. Step 6: Final answer
    x = 799.57

Related Problems

Find fourth proportional to 414.13, 571.76 and 289.57
Half scale
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Double scale
Find fourth proportional to 829.26, 1,144.89 and 580.14
Similar ratio
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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.