Home / 386,067.80-578,948.10-136,621.40

Finding the Fourth Proportional to 386,067.80, 578,948.10 and 136,621.40

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Solution

The fourth proportional to 386,067.80, 578,948.10 and 136,621.40 is: 204,877.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,067.80 : 578,948.10 = 136,621.40 : x
  2. Step 2: Convert to fraction form
    386,067.80/578,948.10 = 136,621.40/x
  3. Step 3: Cross multiply
    386,067.80x = 578,948.10 × 136,621.40
  4. Step 4: Simplify right side
    386,067.80x = 79,096,699,949.34
  5. Step 5: Solve for x
    x = 79,096,699,949.34/386,067.80
  6. Step 6: Final answer
    x = 204,877.74

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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.