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Finding the Fourth Proportional to 612,335.97, 918,921.92 and 212,972.76

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Solution

The fourth proportional to 612,335.97, 918,921.92 and 212,972.76 is: 319,604.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,335.97 : 918,921.92 = 212,972.76 : x
  2. Step 2: Convert to fraction form
    612,335.97/918,921.92 = 212,972.76/x
  3. Step 3: Cross multiply
    612,335.97x = 918,921.92 × 212,972.76
  4. Step 4: Simplify right side
    612,335.97x = 195,705,336,462.04
  5. Step 5: Solve for x
    x = 195,705,336,462.04/612,335.97
  6. Step 6: Final answer
    x = 319,604.51

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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.