Home / 640,971.47-961,014.34-280,969.40

Finding the Fourth Proportional to 640,971.47, 961,014.34 and 280,969.40

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Solution

The fourth proportional to 640,971.47, 961,014.34 and 280,969.40 is: 421,259.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,971.47 : 961,014.34 = 280,969.40 : x
  2. Step 2: Convert to fraction form
    640,971.47/961,014.34 = 280,969.40/x
  3. Step 3: Cross multiply
    640,971.47x = 961,014.34 × 280,969.40
  4. Step 4: Simplify right side
    640,971.47x = 270,015,621,366.75
  5. Step 5: Solve for x
    x = 270,015,621,366.75/640,971.47
  6. Step 6: Final answer
    x = 421,259.97

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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.