Home / 422,942.40-634,409.28-142,457.76

Finding the Fourth Proportional to 422,942.40, 634,409.28 and 142,457.76

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Solution

The fourth proportional to 422,942.40, 634,409.28 and 142,457.76 is: 213,685.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,942.40 : 634,409.28 = 142,457.76 : x
  2. Step 2: Convert to fraction form
    422,942.40/634,409.28 = 142,457.76/x
  3. Step 3: Cross multiply
    422,942.40x = 634,409.28 × 142,457.76
  4. Step 4: Simplify right side
    422,942.40x = 90,376,524,952.01
  5. Step 5: Solve for x
    x = 90,376,524,952.01/422,942.40
  6. Step 6: Final answer
    x = 213,685.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.