Home / 420,768.15-631,157.80-140,285.49

Finding the Fourth Proportional to 420,768.15, 631,157.80 and 140,285.49

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Solution

The fourth proportional to 420,768.15, 631,157.80 and 140,285.49 is: 210,430.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,768.15 : 631,157.80 = 140,285.49 : x
  2. Step 2: Convert to fraction form
    420,768.15/631,157.80 = 140,285.49/x
  3. Step 3: Cross multiply
    420,768.15x = 631,157.80 × 140,285.49
  4. Step 4: Simplify right side
    420,768.15x = 88,542,281,240.32
  5. Step 5: Solve for x
    x = 88,542,281,240.32/420,768.15
  6. Step 6: Final answer
    x = 210,430.09

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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.