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Finding the Fourth Proportional to 718,988.46, 992,563.62 and 447,143.93

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Solution

The fourth proportional to 718,988.46, 992,563.62 and 447,143.93 is: 617,282.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,988.46 : 992,563.62 = 447,143.93 : x
  2. Step 2: Convert to fraction form
    718,988.46/992,563.62 = 447,143.93/x
  3. Step 3: Cross multiply
    718,988.46x = 992,563.62 × 447,143.93
  4. Step 4: Simplify right side
    718,988.46x = 443,818,792,859.01
  5. Step 5: Solve for x
    x = 443,818,792,859.01/718,988.46
  6. Step 6: Final answer
    x = 617,282.22

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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.