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Finding the Fourth Proportional to 549.45, 821.55 and 473.31

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Solution

The fourth proportional to 549.45, 821.55 and 473.31 is: 707.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.45 : 821.55 = 473.31 : x
  2. Step 2: Convert to fraction form
    549.45/821.55 = 473.31/x
  3. Step 3: Cross multiply
    549.45x = 821.55 × 473.31
  4. Step 4: Simplify right side
    549.45x = 388,847.83
  5. Step 5: Solve for x
    x = 388,847.83/549.45
  6. Step 6: Final answer
    x = 707.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.