Home / 1,242,123.67-1,861,856.70-642,481.12

Finding the Fourth Proportional to 1,242,123.67, 1,861,856.70 and 642,481.12

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Solution

The fourth proportional to 1,242,123.67, 1,861,856.70 and 642,481.12 is: 963,034.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,123.67 : 1,861,856.70 = 642,481.12 : x
  2. Step 2: Convert to fraction form
    1,242,123.67/1,861,856.70 = 642,481.12/x
  3. Step 3: Cross multiply
    1,242,123.67x = 1,861,856.70 × 642,481.12
  4. Step 4: Simplify right side
    1,242,123.67x = 1,196,207,777,895.50
  5. Step 5: Solve for x
    x = 1,196,207,777,895.50/1,242,123.67
  6. Step 6: Final answer
    x = 963,034.36

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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.