Home / 643,023.57-887,290.97-352,558.70

Finding the Fourth Proportional to 643,023.57, 887,290.97 and 352,558.70

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Solution

The fourth proportional to 643,023.57, 887,290.97 and 352,558.70 is: 486,486.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,023.57 : 887,290.97 = 352,558.70 : x
  2. Step 2: Convert to fraction form
    643,023.57/887,290.97 = 352,558.70/x
  3. Step 3: Cross multiply
    643,023.57x = 887,290.97 × 352,558.70
  4. Step 4: Simplify right side
    643,023.57x = 312,822,153,123.17
  5. Step 5: Solve for x
    x = 312,822,153,123.17/643,023.57
  6. Step 6: Final answer
    x = 486,486.29

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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.