Home / 407,780.13-611,670.20-127,321.41

Finding the Fourth Proportional to 407,780.13, 611,670.20 and 127,321.41

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Solution

The fourth proportional to 407,780.13, 611,670.20 and 127,321.41 is: 190,982.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,780.13 : 611,670.20 = 127,321.41 : x
  2. Step 2: Convert to fraction form
    407,780.13/611,670.20 = 127,321.41/x
  3. Step 3: Cross multiply
    407,780.13x = 611,670.20 × 127,321.41
  4. Step 4: Simplify right side
    407,780.13x = 77,878,711,682.37
  5. Step 5: Solve for x
    x = 77,878,711,682.37/407,780.13
  6. Step 6: Final answer
    x = 190,982.12

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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.