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Finding the Fourth Proportional to 666,961.36, 920,320.88 and 380,464.32

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Solution

The fourth proportional to 666,961.36, 920,320.88 and 380,464.32 is: 524,991.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,961.36 : 920,320.88 = 380,464.32 : x
  2. Step 2: Convert to fraction form
    666,961.36/920,320.88 = 380,464.32/x
  3. Step 3: Cross multiply
    666,961.36x = 920,320.88 × 380,464.32
  4. Step 4: Simplify right side
    666,961.36x = 350,149,257,791.00
  5. Step 5: Solve for x
    x = 350,149,257,791.00/666,961.36
  6. Step 6: Final answer
    x = 524,991.82

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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.