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Finding the Fourth Proportional to 318,800.46, 439,940.31 and 180,978.20

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Solution

The fourth proportional to 318,800.46, 439,940.31 and 180,978.20 is: 249,747.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,800.46 : 439,940.31 = 180,978.20 : x
  2. Step 2: Convert to fraction form
    318,800.46/439,940.31 = 180,978.20/x
  3. Step 3: Cross multiply
    318,800.46x = 439,940.31 × 180,978.20
  4. Step 4: Simplify right side
    318,800.46x = 79,619,605,200.65
  5. Step 5: Solve for x
    x = 79,619,605,200.65/318,800.46
  6. Step 6: Final answer
    x = 249,747.46

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1.5x scale

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.