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Finding the Fourth Proportional to 312,700.62, 431,573.13 and 197,989.93

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Solution

The fourth proportional to 312,700.62, 431,573.13 and 197,989.93 is: 273,255.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,700.62 : 431,573.13 = 197,989.93 : x
  2. Step 2: Convert to fraction form
    312,700.62/431,573.13 = 197,989.93/x
  3. Step 3: Cross multiply
    312,700.62x = 431,573.13 × 197,989.93
  4. Step 4: Simplify right side
    312,700.62x = 85,447,132,383.18
  5. Step 5: Solve for x
    x = 85,447,132,383.18/312,700.62
  6. Step 6: Final answer
    x = 273,255.40

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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.