Home / 919,415.72-1,267,986.12-643,632.32

Finding the Fourth Proportional to 919,415.72, 1,267,986.12 and 643,632.32

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Solution

The fourth proportional to 919,415.72, 1,267,986.12 and 643,632.32 is: 887,647.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,415.72 : 1,267,986.12 = 643,632.32 : x
  2. Step 2: Convert to fraction form
    919,415.72/1,267,986.12 = 643,632.32/x
  3. Step 3: Cross multiply
    919,415.72x = 1,267,986.12 × 643,632.32
  4. Step 4: Simplify right side
    919,415.72x = 816,116,848,143.40
  5. Step 5: Solve for x
    x = 816,116,848,143.40/919,415.72
  6. Step 6: Final answer
    x = 887,647.26

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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.