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Finding the Fourth Proportional to 667,154.07, 920,603.88 and 380,619

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Solution

The fourth proportional to 667,154.07, 920,603.88 and 380,619 is: 525,215.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,154.07 : 920,603.88 = 380,619 : x
  2. Step 2: Convert to fraction form
    667,154.07/920,603.88 = 380,619/x
  3. Step 3: Cross multiply
    667,154.07x = 920,603.88 × 380,619
  4. Step 4: Simplify right side
    667,154.07x = 350,399,328,201.72
  5. Step 5: Solve for x
    x = 350,399,328,201.72/667,154.07
  6. Step 6: Final answer
    x = 525,215.00

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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.