Home / 643,038.27-887,432.70-356,558.36

Finding the Fourth Proportional to 643,038.27, 887,432.70 and 356,558.36

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Solution

The fourth proportional to 643,038.27, 887,432.70 and 356,558.36 is: 492,072.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,038.27 : 887,432.70 = 356,558.36 : x
  2. Step 2: Convert to fraction form
    643,038.27/887,432.70 = 356,558.36/x
  3. Step 3: Cross multiply
    643,038.27x = 887,432.70 × 356,558.36
  4. Step 4: Simplify right side
    643,038.27x = 316,421,543,685.21
  5. Step 5: Solve for x
    x = 316,421,543,685.21/643,038.27
  6. Step 6: Final answer
    x = 492,072.65

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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.