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Finding the Fourth Proportional to 643,364.72, 887,847.32 and 356,902.96

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Solution

The fourth proportional to 643,364.72, 887,847.32 and 356,902.96 is: 492,528.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,364.72 : 887,847.32 = 356,902.96 : x
  2. Step 2: Convert to fraction form
    643,364.72/887,847.32 = 356,902.96/x
  3. Step 3: Cross multiply
    643,364.72x = 887,847.32 × 356,902.96
  4. Step 4: Simplify right side
    643,364.72x = 316,875,336,536.07
  5. Step 5: Solve for x
    x = 316,875,336,536.07/643,364.72
  6. Step 6: Final answer
    x = 492,528.31

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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.