Home / 499,647.11-689,319.38-318,326.58

Finding the Fourth Proportional to 499,647.11, 689,319.38 and 318,326.58

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Solution

The fourth proportional to 499,647.11, 689,319.38 and 318,326.58 is: 439,167.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,647.11 : 689,319.38 = 318,326.58 : x
  2. Step 2: Convert to fraction form
    499,647.11/689,319.38 = 318,326.58/x
  3. Step 3: Cross multiply
    499,647.11x = 689,319.38 × 318,326.58
  4. Step 4: Simplify right side
    499,647.11x = 219,428,681,558.94
  5. Step 5: Solve for x
    x = 219,428,681,558.94/499,647.11
  6. Step 6: Final answer
    x = 439,167.32

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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.