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Finding the Fourth Proportional to 521,571.40, 719,061.78 and 445,903.27

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Solution

The fourth proportional to 521,571.40, 719,061.78 and 445,903.27 is: 614,742.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,571.40 : 719,061.78 = 445,903.27 : x
  2. Step 2: Convert to fraction form
    521,571.40/719,061.78 = 445,903.27/x
  3. Step 3: Cross multiply
    521,571.40x = 719,061.78 × 445,903.27
  4. Step 4: Simplify right side
    521,571.40x = 320,631,999,034.02
  5. Step 5: Solve for x
    x = 320,631,999,034.02/521,571.40
  6. Step 6: Final answer
    x = 614,742.29

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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.