Home / 420,853.08-631,285.38-140,370.60

Finding the Fourth Proportional to 420,853.08, 631,285.38 and 140,370.60

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Solution

The fourth proportional to 420,853.08, 631,285.38 and 140,370.60 is: 210,557.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,853.08 : 631,285.38 = 140,370.60 : x
  2. Step 2: Convert to fraction form
    420,853.08/631,285.38 = 140,370.60/x
  3. Step 3: Cross multiply
    420,853.08x = 631,285.38 × 140,370.60
  4. Step 4: Simplify right side
    420,853.08x = 88,613,907,561.83
  5. Step 5: Solve for x
    x = 88,613,907,561.83/420,853.08
  6. Step 6: Final answer
    x = 210,557.82

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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.