Home / 1,123,896.40-1,685,844.60-643,631.20

Finding the Fourth Proportional to 1,123,896.40, 1,685,844.60 and 643,631.20

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Solution

The fourth proportional to 1,123,896.40, 1,685,844.60 and 643,631.20 is: 965,446.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123,896.40 : 1,685,844.60 = 643,631.20 : x
  2. Step 2: Convert to fraction form
    1,123,896.40/1,685,844.60 = 643,631.20/x
  3. Step 3: Cross multiply
    1,123,896.40x = 1,685,844.60 × 643,631.20
  4. Step 4: Simplify right side
    1,123,896.40x = 1,085,062,182,911.52
  5. Step 5: Solve for x
    x = 1,085,062,182,911.52/1,123,896.40
  6. Step 6: Final answer
    x = 965,446.80

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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.