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Finding the Fourth Proportional to 612,481.32, 918,721.98 and 191,790

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Solution

The fourth proportional to 612,481.32, 918,721.98 and 191,790 is: 287,685

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,481.32 : 918,721.98 = 191,790 : x
  2. Step 2: Convert to fraction form
    612,481.32/918,721.98 = 191,790/x
  3. Step 3: Cross multiply
    612,481.32x = 918,721.98 × 191,790
  4. Step 4: Simplify right side
    612,481.32x = 176,201,688,544.20
  5. Step 5: Solve for x
    x = 176,201,688,544.20/612,481.32
  6. Step 6: Final answer
    x = 287,685

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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.