Home / 666,720.60-919,845.66-380,033.88

Finding the Fourth Proportional to 666,720.60, 919,845.66 and 380,033.88

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Solution

The fourth proportional to 666,720.60, 919,845.66 and 380,033.88 is: 524,316.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,720.60 : 919,845.66 = 380,033.88 : x
  2. Step 2: Convert to fraction form
    666,720.60/919,845.66 = 380,033.88/x
  3. Step 3: Cross multiply
    666,720.60x = 919,845.66 × 380,033.88
  4. Step 4: Simplify right side
    666,720.60x = 349,572,515,170.96
  5. Step 5: Solve for x
    x = 349,572,515,170.96/666,720.60
  6. Step 6: Final answer
    x = 524,316.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.