Home / 764,911.20-1,147,366.80-345,007.20

Finding the Fourth Proportional to 764,911.20, 1,147,366.80 and 345,007.20

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Solution

The fourth proportional to 764,911.20, 1,147,366.80 and 345,007.20 is: 517,510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,911.20 : 1,147,366.80 = 345,007.20 : x
  2. Step 2: Convert to fraction form
    764,911.20/1,147,366.80 = 345,007.20/x
  3. Step 3: Cross multiply
    764,911.20x = 1,147,366.80 × 345,007.20
  4. Step 4: Simplify right side
    764,911.20x = 395,849,807,040.96
  5. Step 5: Solve for x
    x = 395,849,807,040.96/764,911.20
  6. Step 6: Final answer
    x = 517,510.80

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Double scale
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Similar ratio
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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.