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Finding the Fourth Proportional to 657,989.75, 987,078.65 and 202,619.45

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Solution

The fourth proportional to 657,989.75, 987,078.65 and 202,619.45 is: 303,958.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,989.75 : 987,078.65 = 202,619.45 : x
  2. Step 2: Convert to fraction form
    657,989.75/987,078.65 = 202,619.45/x
  3. Step 3: Cross multiply
    657,989.75x = 987,078.65 × 202,619.45
  4. Step 4: Simplify right side
    657,989.75x = 200,001,334,624.34
  5. Step 5: Solve for x
    x = 200,001,334,624.34/657,989.75
  6. Step 6: Final answer
    x = 303,958.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.