Home / 465,729.64-642,330.94-312,721.72

Finding the Fourth Proportional to 465,729.64, 642,330.94 and 312,721.72

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Solution

The fourth proportional to 465,729.64, 642,330.94 and 312,721.72 is: 431,303.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,729.64 : 642,330.94 = 312,721.72 : x
  2. Step 2: Convert to fraction form
    465,729.64/642,330.94 = 312,721.72/x
  3. Step 3: Cross multiply
    465,729.64x = 642,330.94 × 312,721.72
  4. Step 4: Simplify right side
    465,729.64x = 200,870,836,366.02
  5. Step 5: Solve for x
    x = 200,870,836,366.02/465,729.64
  6. Step 6: Final answer
    x = 431,303.53

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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.