Home / 764,486.40-1,055,002.92-420,337.20

Finding the Fourth Proportional to 764,486.40, 1,055,002.92 and 420,337.20

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Solution

The fourth proportional to 764,486.40, 1,055,002.92 and 420,337.20 is: 580,071.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,486.40 : 1,055,002.92 = 420,337.20 : x
  2. Step 2: Convert to fraction form
    764,486.40/1,055,002.92 = 420,337.20/x
  3. Step 3: Cross multiply
    764,486.40x = 1,055,002.92 × 420,337.20
  4. Step 4: Simplify right side
    764,486.40x = 443,456,973,384.62
  5. Step 5: Solve for x
    x = 443,456,973,384.62/764,486.40
  6. Step 6: Final answer
    x = 580,071.76

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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.