Home / 312,908.28-432,169.86-212,131.32

Finding the Fourth Proportional to 312,908.28, 432,169.86 and 212,131.32

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Solution

The fourth proportional to 312,908.28, 432,169.86 and 212,131.32 is: 292,982.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,908.28 : 432,169.86 = 212,131.32 : x
  2. Step 2: Convert to fraction form
    312,908.28/432,169.86 = 212,131.32/x
  3. Step 3: Cross multiply
    312,908.28x = 432,169.86 × 212,131.32
  4. Step 4: Simplify right side
    312,908.28x = 91,676,762,866.02
  5. Step 5: Solve for x
    x = 91,676,762,866.02/312,908.28
  6. Step 6: Final answer
    x = 292,982.86

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1.5x scale

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.