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Finding the Fourth Proportional to 290,285.87, 435,205.24 and 90,488.03

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Solution

The fourth proportional to 290,285.87, 435,205.24 and 90,488.03 is: 135,662.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,285.87 : 435,205.24 = 90,488.03 : x
  2. Step 2: Convert to fraction form
    290,285.87/435,205.24 = 90,488.03/x
  3. Step 3: Cross multiply
    290,285.87x = 435,205.24 × 90,488.03
  4. Step 4: Simplify right side
    290,285.87x = 39,380,862,411.03
  5. Step 5: Solve for x
    x = 39,380,862,411.03/290,285.87
  6. Step 6: Final answer
    x = 135,662.35

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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.