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Finding the Fourth Proportional to 681,790.96, 940,903.56 and 379,987.12

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Solution

The fourth proportional to 681,790.96, 940,903.56 and 379,987.12 is: 524,400.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,790.96 : 940,903.56 = 379,987.12 : x
  2. Step 2: Convert to fraction form
    681,790.96/940,903.56 = 379,987.12/x
  3. Step 3: Cross multiply
    681,790.96x = 940,903.56 × 379,987.12
  4. Step 4: Simplify right side
    681,790.96x = 357,531,233,962.15
  5. Step 5: Solve for x
    x = 357,531,233,962.15/681,790.96
  6. Step 6: Final answer
    x = 524,400.08

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Double scale
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1.5x scale

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.