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Finding the Fourth Proportional to 216,855.80, 324,851.70 and 190,878.20

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Solution

The fourth proportional to 216,855.80, 324,851.70 and 190,878.20 is: 285,937.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,855.80 : 324,851.70 = 190,878.20 : x
  2. Step 2: Convert to fraction form
    216,855.80/324,851.70 = 190,878.20/x
  3. Step 3: Cross multiply
    216,855.80x = 324,851.70 × 190,878.20
  4. Step 4: Simplify right side
    216,855.80x = 62,007,107,762.94
  5. Step 5: Solve for x
    x = 62,007,107,762.94/216,855.80
  6. Step 6: Final answer
    x = 285,937.05

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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.