Home / 312,401.06-431,145.28-225,257.84

Finding the Fourth Proportional to 312,401.06, 431,145.28 and 225,257.84

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Solution

The fourth proportional to 312,401.06, 431,145.28 and 225,257.84 is: 310,878.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,401.06 : 431,145.28 = 225,257.84 : x
  2. Step 2: Convert to fraction form
    312,401.06/431,145.28 = 225,257.84/x
  3. Step 3: Cross multiply
    312,401.06x = 431,145.28 × 225,257.84
  4. Step 4: Simplify right side
    312,401.06x = 97,118,854,499.00
  5. Step 5: Solve for x
    x = 97,118,854,499.00/312,401.06
  6. Step 6: Final answer
    x = 310,878.77

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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.