Home / 764,445.78-1,054,935.87-420,287.58

Finding the Fourth Proportional to 764,445.78, 1,054,935.87 and 420,287.58

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Solution

The fourth proportional to 764,445.78, 1,054,935.87 and 420,287.58 is: 579,997.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,445.78 : 1,054,935.87 = 420,287.58 : x
  2. Step 2: Convert to fraction form
    764,445.78/1,054,935.87 = 420,287.58/x
  3. Step 3: Cross multiply
    764,445.78x = 1,054,935.87 × 420,287.58
  4. Step 4: Simplify right side
    764,445.78x = 443,376,443,857.50
  5. Step 5: Solve for x
    x = 443,376,443,857.50/764,445.78
  6. Step 6: Final answer
    x = 579,997.24

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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.