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Finding the Fourth Proportional to 312,357.60, 430,877.52 and 197,600.64

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Solution

The fourth proportional to 312,357.60, 430,877.52 and 197,600.64 is: 272,577.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,357.60 : 430,877.52 = 197,600.64 : x
  2. Step 2: Convert to fraction form
    312,357.60/430,877.52 = 197,600.64/x
  3. Step 3: Cross multiply
    312,357.60x = 430,877.52 × 197,600.64
  4. Step 4: Simplify right side
    312,357.60x = 85,141,673,713.61
  5. Step 5: Solve for x
    x = 85,141,673,713.61/312,357.60
  6. Step 6: Final answer
    x = 272,577.56

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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.