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Finding the Fourth Proportional to 499,658.76, 689,335.41 and 318,338.22

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Solution

The fourth proportional to 499,658.76, 689,335.41 and 318,338.22 is: 439,183.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,658.76 : 689,335.41 = 318,338.22 : x
  2. Step 2: Convert to fraction form
    499,658.76/689,335.41 = 318,338.22/x
  3. Step 3: Cross multiply
    499,658.76x = 689,335.41 × 318,338.22
  4. Step 4: Simplify right side
    499,658.76x = 219,441,807,402.37
  5. Step 5: Solve for x
    x = 219,441,807,402.37/499,658.76
  6. Step 6: Final answer
    x = 439,183.35

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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.