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Finding the Fourth Proportional to 499,993.22, 689,339.22 and 318,638.98

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Solution

The fourth proportional to 499,993.22, 689,339.22 and 318,638.98 is: 439,306.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,993.22 : 689,339.22 = 318,638.98 : x
  2. Step 2: Convert to fraction form
    499,993.22/689,339.22 = 318,638.98/x
  3. Step 3: Cross multiply
    499,993.22x = 689,339.22 × 318,638.98
  4. Step 4: Simplify right side
    499,993.22x = 219,650,345,934.80
  5. Step 5: Solve for x
    x = 219,650,345,934.80/499,993.22
  6. Step 6: Final answer
    x = 439,306.65

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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.