Home / 643,378.14-887,890.95-356,898.42

Finding the Fourth Proportional to 643,378.14, 887,890.95 and 356,898.42

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Solution

The fourth proportional to 643,378.14, 887,890.95 and 356,898.42 is: 492,535.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,378.14 : 887,890.95 = 356,898.42 : x
  2. Step 2: Convert to fraction form
    643,378.14/887,890.95 = 356,898.42/x
  3. Step 3: Cross multiply
    643,378.14x = 887,890.95 × 356,898.42
  4. Step 4: Simplify right side
    643,378.14x = 316,886,877,187.30
  5. Step 5: Solve for x
    x = 316,886,877,187.30/643,378.14
  6. Step 6: Final answer
    x = 492,535.97

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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.