Home / 420,999.40-631,504.62-140,516.52

Finding the Fourth Proportional to 420,999.40, 631,504.62 and 140,516.52

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Solution

The fourth proportional to 420,999.40, 631,504.62 and 140,516.52 is: 210,776.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,999.40 : 631,504.62 = 140,516.52 : x
  2. Step 2: Convert to fraction form
    420,999.40/631,504.62 = 140,516.52/x
  3. Step 3: Cross multiply
    420,999.40x = 631,504.62 × 140,516.52
  4. Step 4: Simplify right side
    420,999.40x = 88,736,831,566.32
  5. Step 5: Solve for x
    x = 88,736,831,566.32/420,999.40
  6. Step 6: Final answer
    x = 210,776.62

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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.