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Finding the Fourth Proportional to 488,394.12, 673,990.56 and 318,530.64

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Solution

The fourth proportional to 488,394.12, 673,990.56 and 318,530.64 is: 439,576.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,394.12 : 673,990.56 = 318,530.64 : x
  2. Step 2: Convert to fraction form
    488,394.12/673,990.56 = 318,530.64/x
  3. Step 3: Cross multiply
    488,394.12x = 673,990.56 × 318,530.64
  4. Step 4: Simplify right side
    488,394.12x = 214,686,644,430.76
  5. Step 5: Solve for x
    x = 214,686,644,430.76/488,394.12
  6. Step 6: Final answer
    x = 439,576.64

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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.