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Finding the Fourth Proportional to 818.24, 1,129.08 and 482.19

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Solution

The fourth proportional to 818.24, 1,129.08 and 482.19 is: 665.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.24 : 1,129.08 = 482.19 : x
  2. Step 2: Convert to fraction form
    818.24/1,129.08 = 482.19/x
  3. Step 3: Cross multiply
    818.24x = 1,129.08 × 482.19
  4. Step 4: Simplify right side
    818.24x = 544,428.66
  5. Step 5: Solve for x
    x = 544,428.66/818.24
  6. Step 6: Final answer
    x = 665.37

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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.