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Finding the Fourth Proportional to 315,729.72, 473,594.58 and 128,755.80

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Solution

The fourth proportional to 315,729.72, 473,594.58 and 128,755.80 is: 193,133.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,729.72 : 473,594.58 = 128,755.80 : x
  2. Step 2: Convert to fraction form
    315,729.72/473,594.58 = 128,755.80/x
  3. Step 3: Cross multiply
    315,729.72x = 473,594.58 × 128,755.80
  4. Step 4: Simplify right side
    315,729.72x = 60,978,049,023.56
  5. Step 5: Solve for x
    x = 60,978,049,023.56/315,729.72
  6. Step 6: Final answer
    x = 193,133.70

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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.