Home / 386,543.67-579,870.20-120,331.09

Finding the Fourth Proportional to 386,543.67, 579,870.20 and 120,331.09

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Solution

The fourth proportional to 386,543.67, 579,870.20 and 120,331.09 is: 180,513.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,543.67 : 579,870.20 = 120,331.09 : x
  2. Step 2: Convert to fraction form
    386,543.67/579,870.20 = 120,331.09/x
  3. Step 3: Cross multiply
    386,543.67x = 579,870.20 × 120,331.09
  4. Step 4: Simplify right side
    386,543.67x = 69,776,413,224.52
  5. Step 5: Solve for x
    x = 69,776,413,224.52/386,543.67
  6. Step 6: Final answer
    x = 180,513.66

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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.