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Finding the Fourth Proportional to 718,988.71, 992,563.97 and 447,144.18

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Solution

The fourth proportional to 718,988.71, 992,563.97 and 447,144.18 is: 617,282.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,988.71 : 992,563.97 = 447,144.18 : x
  2. Step 2: Convert to fraction form
    718,988.71/992,563.97 = 447,144.18/x
  3. Step 3: Cross multiply
    718,988.71x = 992,563.97 × 447,144.18
  4. Step 4: Simplify right side
    718,988.71x = 443,819,202,463.20
  5. Step 5: Solve for x
    x = 443,819,202,463.20/718,988.71
  6. Step 6: Final answer
    x = 617,282.58

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1.5x scale

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.