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Finding the Fourth Proportional to 310,546.76, 428,486.10 and 197,535.56

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Solution

The fourth proportional to 310,546.76, 428,486.10 and 197,535.56 is: 272,555.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,546.76 : 428,486.10 = 197,535.56 : x
  2. Step 2: Convert to fraction form
    310,546.76/428,486.10 = 197,535.56/x
  3. Step 3: Cross multiply
    310,546.76x = 428,486.10 × 197,535.56
  4. Step 4: Simplify right side
    310,546.76x = 84,641,241,715.72
  5. Step 5: Solve for x
    x = 84,641,241,715.72/310,546.76
  6. Step 6: Final answer
    x = 272,555.55

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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.