Home / 420,953.11-631,435.07-140,470.36

Finding the Fourth Proportional to 420,953.11, 631,435.07 and 140,470.36

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Solution

The fourth proportional to 420,953.11, 631,435.07 and 140,470.36 is: 210,707.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,953.11 : 631,435.07 = 140,470.36 : x
  2. Step 2: Convert to fraction form
    420,953.11/631,435.07 = 140,470.36/x
  3. Step 3: Cross multiply
    420,953.11x = 631,435.07 × 140,470.36
  4. Step 4: Simplify right side
    420,953.11x = 88,697,910,897.17
  5. Step 5: Solve for x
    x = 88,697,910,897.17/420,953.11
  6. Step 6: Final answer
    x = 210,707.34

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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.