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Finding the Fourth Proportional to 479,069.10, 718,603.65 and 320,438.70

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Solution

The fourth proportional to 479,069.10, 718,603.65 and 320,438.70 is: 480,658.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,069.10 : 718,603.65 = 320,438.70 : x
  2. Step 2: Convert to fraction form
    479,069.10/718,603.65 = 320,438.70/x
  3. Step 3: Cross multiply
    479,069.10x = 718,603.65 × 320,438.70
  4. Step 4: Simplify right side
    479,069.10x = 230,268,419,421.26
  5. Step 5: Solve for x
    x = 230,268,419,421.26/479,069.10
  6. Step 6: Final answer
    x = 480,658.05

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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.