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Finding the Fourth Proportional to 318,362.40, 477,062.46 and 212,992.74

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Solution

The fourth proportional to 318,362.40, 477,062.46 and 212,992.74 is: 319,167.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,362.40 : 477,062.46 = 212,992.74 : x
  2. Step 2: Convert to fraction form
    318,362.40/477,062.46 = 212,992.74/x
  3. Step 3: Cross multiply
    318,362.40x = 477,062.46 × 212,992.74
  4. Step 4: Simplify right side
    318,362.40x = 101,610,840,506.54
  5. Step 5: Solve for x
    x = 101,610,840,506.54/318,362.40
  6. Step 6: Final answer
    x = 319,167.21

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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.