Home / 661,308.73-911,749.46-428,321.14

Finding the Fourth Proportional to 661,308.73, 911,749.46 and 428,321.14

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Solution

The fourth proportional to 661,308.73, 911,749.46 and 428,321.14 is: 590,528.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,308.73 : 911,749.46 = 428,321.14 : x
  2. Step 2: Convert to fraction form
    661,308.73/911,749.46 = 428,321.14/x
  3. Step 3: Cross multiply
    661,308.73x = 911,749.46 × 428,321.14
  4. Step 4: Simplify right side
    661,308.73x = 390,521,568,101.58
  5. Step 5: Solve for x
    x = 390,521,568,101.58/661,308.73
  6. Step 6: Final answer
    x = 590,528.37

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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.