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Finding the Fourth Proportional to 612,649.32, 918,974.39 and 191,958

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Solution

The fourth proportional to 612,649.32, 918,974.39 and 191,958 is: 287,937.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,649.32 : 918,974.39 = 191,958 : x
  2. Step 2: Convert to fraction form
    612,649.32/918,974.39 = 191,958/x
  3. Step 3: Cross multiply
    612,649.32x = 918,974.39 × 191,958
  4. Step 4: Simplify right side
    612,649.32x = 176,404,484,995.83
  5. Step 5: Solve for x
    x = 176,404,484,995.83/612,649.32
  6. Step 6: Final answer
    x = 287,937.13

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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.