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Finding the Fourth Proportional to 568,485.81, 784,489.86 and 313,831.53

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Solution

The fourth proportional to 568,485.81, 784,489.86 and 313,831.53 is: 433,076.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    568,485.81 : 784,489.86 = 313,831.53 : x
  2. Step 2: Convert to fraction form
    568,485.81/784,489.86 = 313,831.53/x
  3. Step 3: Cross multiply
    568,485.81x = 784,489.86 × 313,831.53
  4. Step 4: Simplify right side
    568,485.81x = 246,197,653,033.29
  5. Step 5: Solve for x
    x = 246,197,653,033.29/568,485.81
  6. Step 6: Final answer
    x = 433,076.16

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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.