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Finding the Fourth Proportional to 818.63, 1,129.24 and 504.05

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Solution

The fourth proportional to 818.63, 1,129.24 and 504.05 is: 695.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.63 : 1,129.24 = 504.05 : x
  2. Step 2: Convert to fraction form
    818.63/1,129.24 = 504.05/x
  3. Step 3: Cross multiply
    818.63x = 1,129.24 × 504.05
  4. Step 4: Simplify right side
    818.63x = 569,193.42
  5. Step 5: Solve for x
    x = 569,193.42/818.63
  6. Step 6: Final answer
    x = 695.30

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Double scale
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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.