Home / 764,899.32-1,146,831.32-428,172.40

Finding the Fourth Proportional to 764,899.32, 1,146,831.32 and 428,172.40

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Solution

The fourth proportional to 764,899.32, 1,146,831.32 and 428,172.40 is: 641,968.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,899.32 : 1,146,831.32 = 428,172.40 : x
  2. Step 2: Convert to fraction form
    764,899.32/1,146,831.32 = 428,172.40/x
  3. Step 3: Cross multiply
    764,899.32x = 1,146,831.32 × 428,172.40
  4. Step 4: Simplify right side
    764,899.32x = 491,041,518,679.57
  5. Step 5: Solve for x
    x = 491,041,518,679.57/764,899.32
  6. Step 6: Final answer
    x = 641,968.83

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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.