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Finding the Fourth Proportional to 614,072.88, 919,987.07 and 445,174.25

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Solution

The fourth proportional to 614,072.88, 919,987.07 and 445,174.25 is: 666,947.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,072.88 : 919,987.07 = 445,174.25 : x
  2. Step 2: Convert to fraction form
    614,072.88/919,987.07 = 445,174.25/x
  3. Step 3: Cross multiply
    614,072.88x = 919,987.07 × 445,174.25
  4. Step 4: Simplify right side
    614,072.88x = 409,554,547,071.14
  5. Step 5: Solve for x
    x = 409,554,547,071.14/614,072.88
  6. Step 6: Final answer
    x = 666,947.78

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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.