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Finding the Fourth Proportional to 521,668.42, 719,909.88 and 303,871.50

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Solution

The fourth proportional to 521,668.42, 719,909.88 and 303,871.50 is: 419,347.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,668.42 : 719,909.88 = 303,871.50 : x
  2. Step 2: Convert to fraction form
    521,668.42/719,909.88 = 303,871.50/x
  3. Step 3: Cross multiply
    521,668.42x = 719,909.88 × 303,871.50
  4. Step 4: Simplify right side
    521,668.42x = 218,760,093,960.90
  5. Step 5: Solve for x
    x = 218,760,093,960.90/521,668.42
  6. Step 6: Final answer
    x = 419,347.02

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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.