Home / 386,428.20-579,671.10-137,077.80

Finding the Fourth Proportional to 386,428.20, 579,671.10 and 137,077.80

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Solution

The fourth proportional to 386,428.20, 579,671.10 and 137,077.80 is: 205,626.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,428.20 : 579,671.10 = 137,077.80 : x
  2. Step 2: Convert to fraction form
    386,428.20/579,671.10 = 137,077.80/x
  3. Step 3: Cross multiply
    386,428.20x = 579,671.10 × 137,077.80
  4. Step 4: Simplify right side
    386,428.20x = 79,460,039,111.58
  5. Step 5: Solve for x
    x = 79,460,039,111.58/386,428.20
  6. Step 6: Final answer
    x = 205,626.92

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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.