Home / 1,385,856.67-1,912,428.39-869,887.79

Finding the Fourth Proportional to 1,385,856.67, 1,912,428.39 and 869,887.79

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Solution

The fourth proportional to 1,385,856.67, 1,912,428.39 and 869,887.79 is: 1,200,411.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,856.67 : 1,912,428.39 = 869,887.79 : x
  2. Step 2: Convert to fraction form
    1,385,856.67/1,912,428.39 = 869,887.79/x
  3. Step 3: Cross multiply
    1,385,856.67x = 1,912,428.39 × 869,887.79
  4. Step 4: Simplify right side
    1,385,856.67x = 1,663,598,101,360.92
  5. Step 5: Solve for x
    x = 1,663,598,101,360.92/1,385,856.67
  6. Step 6: Final answer
    x = 1,200,411.37

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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.