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Finding the Fourth Proportional to 643,425.97, 887,928.88 and 356,946.06

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Solution

The fourth proportional to 643,425.97, 887,928.88 and 356,946.06 is: 492,586.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,425.97 : 887,928.88 = 356,946.06 : x
  2. Step 2: Convert to fraction form
    643,425.97/887,928.88 = 356,946.06/x
  3. Step 3: Cross multiply
    643,425.97x = 887,928.88 × 356,946.06
  4. Step 4: Simplify right side
    643,425.97x = 316,942,710,836.57
  5. Step 5: Solve for x
    x = 316,942,710,836.57/643,425.97
  6. Step 6: Final answer
    x = 492,586.14

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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.