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Finding the Fourth Proportional to 216,257.99, 324,387 and 64,457.42

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Solution

The fourth proportional to 216,257.99, 324,387 and 64,457.42 is: 96,686.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,257.99 : 324,387 = 64,457.42 : x
  2. Step 2: Convert to fraction form
    216,257.99/324,387 = 64,457.42/x
  3. Step 3: Cross multiply
    216,257.99x = 324,387 × 64,457.42
  4. Step 4: Simplify right side
    216,257.99x = 20,909,147,479.61
  5. Step 5: Solve for x
    x = 20,909,147,479.61/216,257.99
  6. Step 6: Final answer
    x = 96,686.13

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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.