Home / 430,334.10-645,501.15-311,447.70

Finding the Fourth Proportional to 430,334.10, 645,501.15 and 311,447.70

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Solution

The fourth proportional to 430,334.10, 645,501.15 and 311,447.70 is: 467,171.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,334.10 : 645,501.15 = 311,447.70 : x
  2. Step 2: Convert to fraction form
    430,334.10/645,501.15 = 311,447.70/x
  3. Step 3: Cross multiply
    430,334.10x = 645,501.15 × 311,447.70
  4. Step 4: Simplify right side
    430,334.10x = 201,039,848,514.86
  5. Step 5: Solve for x
    x = 201,039,848,514.86/430,334.10
  6. Step 6: Final answer
    x = 467,171.55

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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.