Home / 810,400.74-1,215,652.95-311,764.74

Finding the Fourth Proportional to 810,400.74, 1,215,652.95 and 311,764.74

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Solution

The fourth proportional to 810,400.74, 1,215,652.95 and 311,764.74 is: 467,667.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,400.74 : 1,215,652.95 = 311,764.74 : x
  2. Step 2: Convert to fraction form
    810,400.74/1,215,652.95 = 311,764.74/x
  3. Step 3: Cross multiply
    810,400.74x = 1,215,652.95 × 311,764.74
  4. Step 4: Simplify right side
    810,400.74x = 378,997,725,886.98
  5. Step 5: Solve for x
    x = 378,997,725,886.98/810,400.74
  6. Step 6: Final answer
    x = 467,667.05

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1.5x scale

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.