Home / 420,998.40-631,503.12-140,515.52

Finding the Fourth Proportional to 420,998.40, 631,503.12 and 140,515.52

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Solution

The fourth proportional to 420,998.40, 631,503.12 and 140,515.52 is: 210,775.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,998.40 : 631,503.12 = 140,515.52 : x
  2. Step 2: Convert to fraction form
    420,998.40/631,503.12 = 140,515.52/x
  3. Step 3: Cross multiply
    420,998.40x = 631,503.12 × 140,515.52
  4. Step 4: Simplify right side
    420,998.40x = 88,735,989,288.42
  5. Step 5: Solve for x
    x = 88,735,989,288.42/420,998.40
  6. Step 6: Final answer
    x = 210,775.12

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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.