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Finding the Fourth Proportional to 216,605.80, 324,860.10 and 142,247.80

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Solution

The fourth proportional to 216,605.80, 324,860.10 and 142,247.80 is: 213,339.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,605.80 : 324,860.10 = 142,247.80 : x
  2. Step 2: Convert to fraction form
    216,605.80/324,860.10 = 142,247.80/x
  3. Step 3: Cross multiply
    216,605.80x = 324,860.10 × 142,247.80
  4. Step 4: Simplify right side
    216,605.80x = 46,210,634,532.78
  5. Step 5: Solve for x
    x = 46,210,634,532.78/216,605.80
  6. Step 6: Final answer
    x = 213,339.78

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1.5x scale

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.