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Finding the Fourth Proportional to 643,098.18, 887,528.70 and 356,710.80

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Solution

The fourth proportional to 643,098.18, 887,528.70 and 356,710.80 is: 492,290.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,098.18 : 887,528.70 = 356,710.80 : x
  2. Step 2: Convert to fraction form
    643,098.18/887,528.70 = 356,710.80/x
  3. Step 3: Cross multiply
    643,098.18x = 887,528.70 × 356,710.80
  4. Step 4: Simplify right side
    643,098.18x = 316,591,072,599.96
  5. Step 5: Solve for x
    x = 316,591,072,599.96/643,098.18
  6. Step 6: Final answer
    x = 492,290.42

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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.