Home / 421,403.74-631,973.85-140,855.38

Finding the Fourth Proportional to 421,403.74, 631,973.85 and 140,855.38

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Solution

The fourth proportional to 421,403.74, 631,973.85 and 140,855.38 is: 211,239.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,403.74 : 631,973.85 = 140,855.38 : x
  2. Step 2: Convert to fraction form
    421,403.74/631,973.85 = 140,855.38/x
  3. Step 3: Cross multiply
    421,403.74x = 631,973.85 × 140,855.38
  4. Step 4: Simplify right side
    421,403.74x = 89,016,916,791.81
  5. Step 5: Solve for x
    x = 89,016,916,791.81/421,403.74
  6. Step 6: Final answer
    x = 211,239.03

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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.