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Finding the Fourth Proportional to 308,894.40, 426,268.83 and 171,070.47

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Solution

The fourth proportional to 308,894.40, 426,268.83 and 171,070.47 is: 236,074.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,894.40 : 426,268.83 = 171,070.47 : x
  2. Step 2: Convert to fraction form
    308,894.40/426,268.83 = 171,070.47/x
  3. Step 3: Cross multiply
    308,894.40x = 426,268.83 × 171,070.47
  4. Step 4: Simplify right side
    308,894.40x = 72,922,009,094.45
  5. Step 5: Solve for x
    x = 72,922,009,094.45/308,894.40
  6. Step 6: Final answer
    x = 236,074.23

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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.