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Finding the Fourth Proportional to 641,675.25, 885,511.83 and 355,195.32

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Solution

The fourth proportional to 641,675.25, 885,511.83 and 355,195.32 is: 490,169.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,675.25 : 885,511.83 = 355,195.32 : x
  2. Step 2: Convert to fraction form
    641,675.25/885,511.83 = 355,195.32/x
  3. Step 3: Cross multiply
    641,675.25x = 885,511.83 × 355,195.32
  4. Step 4: Simplify right side
    641,675.25x = 314,529,657,820.64
  5. Step 5: Solve for x
    x = 314,529,657,820.64/641,675.25
  6. Step 6: Final answer
    x = 490,169.53

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1.5x scale

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.