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Finding the Fourth Proportional to 420,673.92, 631,011.52 and 140,213.12

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Solution

The fourth proportional to 420,673.92, 631,011.52 and 140,213.12 is: 210,319.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,673.92 : 631,011.52 = 140,213.12 : x
  2. Step 2: Convert to fraction form
    420,673.92/631,011.52 = 140,213.12/x
  3. Step 3: Cross multiply
    420,673.92x = 631,011.52 × 140,213.12
  4. Step 4: Simplify right side
    420,673.92x = 88,476,093,975.14
  5. Step 5: Solve for x
    x = 88,476,093,975.14/420,673.92
  6. Step 6: Final answer
    x = 210,319.89

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1.5x scale

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.