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Finding the Fourth Proportional to 308,509, 425,724.66 and 170,679.64

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Solution

The fourth proportional to 308,509, 425,724.66 and 170,679.64 is: 235,528.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,509 : 425,724.66 = 170,679.64 : x
  2. Step 2: Convert to fraction form
    308,509/425,724.66 = 170,679.64/x
  3. Step 3: Cross multiply
    308,509x = 425,724.66 × 170,679.64
  4. Step 4: Simplify right side
    308,509x = 72,662,531,707.92
  5. Step 5: Solve for x
    x = 72,662,531,707.92/308,509
  6. Step 6: Final answer
    x = 235,528.08

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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.