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Finding the Fourth Proportional to 315,203.45, 434,978.69 and 179,237.40

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Solution

The fourth proportional to 315,203.45, 434,978.69 and 179,237.40 is: 247,346.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,203.45 : 434,978.69 = 179,237.40 : x
  2. Step 2: Convert to fraction form
    315,203.45/434,978.69 = 179,237.40/x
  3. Step 3: Cross multiply
    315,203.45x = 434,978.69 × 179,237.40
  4. Step 4: Simplify right side
    315,203.45x = 77,964,448,554.82
  5. Step 5: Solve for x
    x = 77,964,448,554.82/315,203.45
  6. Step 6: Final answer
    x = 247,346.44

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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.