Home / 420,811.20-631,216.80-171,493.20

Finding the Fourth Proportional to 420,811.20, 631,216.80 and 171,493.20

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Solution

The fourth proportional to 420,811.20, 631,216.80 and 171,493.20 is: 257,239.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,811.20 : 631,216.80 = 171,493.20 : x
  2. Step 2: Convert to fraction form
    420,811.20/631,216.80 = 171,493.20/x
  3. Step 3: Cross multiply
    420,811.20x = 631,216.80 × 171,493.20
  4. Step 4: Simplify right side
    420,811.20x = 108,249,388,925.76
  5. Step 5: Solve for x
    x = 108,249,388,925.76/420,811.20
  6. Step 6: Final answer
    x = 257,239.80

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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.