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Finding the Fourth Proportional to 718,989.21, 992,564.66 and 447,144.68

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Solution

The fourth proportional to 718,989.21, 992,564.66 and 447,144.68 is: 617,283.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,989.21 : 992,564.66 = 447,144.68 : x
  2. Step 2: Convert to fraction form
    718,989.21/992,564.66 = 447,144.68/x
  3. Step 3: Cross multiply
    718,989.21x = 992,564.66 × 447,144.68
  4. Step 4: Simplify right side
    718,989.21x = 443,820,007,275.01
  5. Step 5: Solve for x
    x = 443,820,007,275.01/718,989.21
  6. Step 6: Final answer
    x = 617,283.27

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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.