Home / 421,238.04-631,889.70-140,756.28

Finding the Fourth Proportional to 421,238.04, 631,889.70 and 140,756.28

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Solution

The fourth proportional to 421,238.04, 631,889.70 and 140,756.28 is: 211,145.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,238.04 : 631,889.70 = 140,756.28 : x
  2. Step 2: Convert to fraction form
    421,238.04/631,889.70 = 140,756.28/x
  3. Step 3: Cross multiply
    421,238.04x = 631,889.70 × 140,756.28
  4. Step 4: Simplify right side
    421,238.04x = 88,942,443,542.32
  5. Step 5: Solve for x
    x = 88,942,443,542.32/421,238.04
  6. Step 6: Final answer
    x = 211,145.33

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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.