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Finding the Fourth Proportional to 420,984.69, 631,950.30 and 168,443.39

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Solution

The fourth proportional to 420,984.69, 631,950.30 and 168,443.39 is: 252,854.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,984.69 : 631,950.30 = 168,443.39 : x
  2. Step 2: Convert to fraction form
    420,984.69/631,950.30 = 168,443.39/x
  3. Step 3: Cross multiply
    420,984.69x = 631,950.30 × 168,443.39
  4. Step 4: Simplify right side
    420,984.69x = 106,447,847,683.77
  5. Step 5: Solve for x
    x = 106,447,847,683.77/420,984.69
  6. Step 6: Final answer
    x = 252,854.44

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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.