Home / 312,921.28-432,187.80-212,144.32

Finding the Fourth Proportional to 312,921.28, 432,187.80 and 212,144.32

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Solution

The fourth proportional to 312,921.28, 432,187.80 and 212,144.32 is: 293,000.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,921.28 : 432,187.80 = 212,144.32 : x
  2. Step 2: Convert to fraction form
    312,921.28/432,187.80 = 212,144.32/x
  3. Step 3: Cross multiply
    312,921.28x = 432,187.80 × 212,144.32
  4. Step 4: Simplify right side
    312,921.28x = 91,686,186,943.30
  5. Step 5: Solve for x
    x = 91,686,186,943.30/312,921.28
  6. Step 6: Final answer
    x = 293,000.81

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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.