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Finding the Fourth Proportional to 352,816.11, 486,903.15 and 216,855.81

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Solution

The fourth proportional to 352,816.11, 486,903.15 and 216,855.81 is: 299,271.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,816.11 : 486,903.15 = 216,855.81 : x
  2. Step 2: Convert to fraction form
    352,816.11/486,903.15 = 216,855.81/x
  3. Step 3: Cross multiply
    352,816.11x = 486,903.15 × 216,855.81
  4. Step 4: Simplify right side
    352,816.11x = 105,587,776,984.80
  5. Step 5: Solve for x
    x = 105,587,776,984.80/352,816.11
  6. Step 6: Final answer
    x = 299,271.42

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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.