Home / 427,276.40-640,513.65-161,215.70

Finding the Fourth Proportional to 427,276.40, 640,513.65 and 161,215.70

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Solution

The fourth proportional to 427,276.40, 640,513.65 and 161,215.70 is: 241,672.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,276.40 : 640,513.65 = 161,215.70 : x
  2. Step 2: Convert to fraction form
    427,276.40/640,513.65 = 161,215.70/x
  3. Step 3: Cross multiply
    427,276.40x = 640,513.65 × 161,215.70
  4. Step 4: Simplify right side
    427,276.40x = 103,260,856,444.31
  5. Step 5: Solve for x
    x = 103,260,856,444.31/427,276.40
  6. Step 6: Final answer
    x = 241,672.27

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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.