Home / 420,977.38-631,865.29-260,568.09

Finding the Fourth Proportional to 420,977.38, 631,865.29 and 260,568.09

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Solution

The fourth proportional to 420,977.38, 631,865.29 and 260,568.09 is: 391,099.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,977.38 : 631,865.29 = 260,568.09 : x
  2. Step 2: Convert to fraction form
    420,977.38/631,865.29 = 260,568.09/x
  3. Step 3: Cross multiply
    420,977.38x = 631,865.29 × 260,568.09
  4. Step 4: Simplify right side
    420,977.38x = 164,643,931,752.60
  5. Step 5: Solve for x
    x = 164,643,931,752.60/420,977.38
  6. Step 6: Final answer
    x = 391,099.24

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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.