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Finding the Fourth Proportional to 711,659.12, 982,080.86 and 389,364.57

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Solution

The fourth proportional to 711,659.12, 982,080.86 and 389,364.57 is: 537,318.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,659.12 : 982,080.86 = 389,364.57 : x
  2. Step 2: Convert to fraction form
    711,659.12/982,080.86 = 389,364.57/x
  3. Step 3: Cross multiply
    711,659.12x = 982,080.86 × 389,364.57
  4. Step 4: Simplify right side
    711,659.12x = 382,387,489,812.31
  5. Step 5: Solve for x
    x = 382,387,489,812.31/711,659.12
  6. Step 6: Final answer
    x = 537,318.33

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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.