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Finding the Fourth Proportional to 652,228.20, 978,342.30 and 439,651.80

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Solution

The fourth proportional to 652,228.20, 978,342.30 and 439,651.80 is: 659,477.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,228.20 : 978,342.30 = 439,651.80 : x
  2. Step 2: Convert to fraction form
    652,228.20/978,342.30 = 439,651.80/x
  3. Step 3: Cross multiply
    652,228.20x = 978,342.30 × 439,651.80
  4. Step 4: Simplify right side
    652,228.20x = 430,129,953,211.14
  5. Step 5: Solve for x
    x = 430,129,953,211.14/652,228.20
  6. Step 6: Final answer
    x = 659,477.70

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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.