Home / 420,936.83-631,410.72-140,454.08

Finding the Fourth Proportional to 420,936.83, 631,410.72 and 140,454.08

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Solution

The fourth proportional to 420,936.83, 631,410.72 and 140,454.08 is: 210,682.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,936.83 : 631,410.72 = 140,454.08 : x
  2. Step 2: Convert to fraction form
    420,936.83/631,410.72 = 140,454.08/x
  3. Step 3: Cross multiply
    420,936.83x = 631,410.72 × 140,454.08
  4. Step 4: Simplify right side
    420,936.83x = 88,684,211,779.74
  5. Step 5: Solve for x
    x = 88,684,211,779.74/420,936.83
  6. Step 6: Final answer
    x = 210,682.95

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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.