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Finding the Fourth Proportional to 352,899.84, 487,059.84 and 257,721.60

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Solution

The fourth proportional to 352,899.84, 487,059.84 and 257,721.60 is: 355,698.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,899.84 : 487,059.84 = 257,721.60 : x
  2. Step 2: Convert to fraction form
    352,899.84/487,059.84 = 257,721.60/x
  3. Step 3: Cross multiply
    352,899.84x = 487,059.84 × 257,721.60
  4. Step 4: Simplify right side
    352,899.84x = 125,525,841,260.54
  5. Step 5: Solve for x
    x = 125,525,841,260.54/352,899.84
  6. Step 6: Final answer
    x = 355,698.21

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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.