Home / 764,897.56-1,146,828.71-428,170.64

Finding the Fourth Proportional to 764,897.56, 1,146,828.71 and 428,170.64

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Solution

The fourth proportional to 764,897.56, 1,146,828.71 and 428,170.64 is: 641,966.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,897.56 : 1,146,828.71 = 428,170.64 : x
  2. Step 2: Convert to fraction form
    764,897.56/1,146,828.71 = 428,170.64/x
  3. Step 3: Cross multiply
    764,897.56x = 1,146,828.71 × 428,170.64
  4. Step 4: Simplify right side
    764,897.56x = 491,038,378,067.36
  5. Step 5: Solve for x
    x = 491,038,378,067.36/764,897.56
  6. Step 6: Final answer
    x = 641,966.20

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Double scale
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1.5x scale

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.