Home / 1,428,495.35-1,971,380.34-783,938.76

Finding the Fourth Proportional to 1,428,495.35, 1,971,380.34 and 783,938.76

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Solution

The fourth proportional to 1,428,495.35, 1,971,380.34 and 783,938.76 is: 1,081,866.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,495.35 : 1,971,380.34 = 783,938.76 : x
  2. Step 2: Convert to fraction form
    1,428,495.35/1,971,380.34 = 783,938.76/x
  3. Step 3: Cross multiply
    1,428,495.35x = 1,971,380.34 × 783,938.76
  4. Step 4: Simplify right side
    1,428,495.35x = 1,545,441,459,227.98
  5. Step 5: Solve for x
    x = 1,545,441,459,227.98/1,428,495.35
  6. Step 6: Final answer
    x = 1,081,866.64

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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.