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Finding the Fourth Proportional to 428,279.08, 591,005.22 and 234,685.64

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Solution

The fourth proportional to 428,279.08, 591,005.22 and 234,685.64 is: 323,855.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,279.08 : 591,005.22 = 234,685.64 : x
  2. Step 2: Convert to fraction form
    428,279.08/591,005.22 = 234,685.64/x
  3. Step 3: Cross multiply
    428,279.08x = 591,005.22 × 234,685.64
  4. Step 4: Simplify right side
    428,279.08x = 138,700,438,299.04
  5. Step 5: Solve for x
    x = 138,700,438,299.04/428,279.08
  6. Step 6: Final answer
    x = 323,855.27

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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.