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Finding the Fourth Proportional to 820.63, 1,132.58 and 471.32

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Solution

The fourth proportional to 820.63, 1,132.58 and 471.32 is: 650.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.63 : 1,132.58 = 471.32 : x
  2. Step 2: Convert to fraction form
    820.63/1,132.58 = 471.32/x
  3. Step 3: Cross multiply
    820.63x = 1,132.58 × 471.32
  4. Step 4: Simplify right side
    820.63x = 533,799.59
  5. Step 5: Solve for x
    x = 533,799.59/820.63
  6. Step 6: Final answer
    x = 650.48

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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.