Home / 809,747.47-1,215,358.31-430,986.21

Finding the Fourth Proportional to 809,747.47, 1,215,358.31 and 430,986.21

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Solution

The fourth proportional to 809,747.47, 1,215,358.31 and 430,986.21 is: 646,871.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,747.47 : 1,215,358.31 = 430,986.21 : x
  2. Step 2: Convert to fraction form
    809,747.47/1,215,358.31 = 430,986.21/x
  3. Step 3: Cross multiply
    809,747.47x = 1,215,358.31 × 430,986.21
  4. Step 4: Simplify right side
    809,747.47x = 523,802,671,818.91
  5. Step 5: Solve for x
    x = 523,802,671,818.91/809,747.47
  6. Step 6: Final answer
    x = 646,871.64

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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.