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Finding the Fourth Proportional to 386,841.66, 580,427.61 and 218,488.38

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Solution

The fourth proportional to 386,841.66, 580,427.61 and 218,488.38 is: 327,825.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,841.66 : 580,427.61 = 218,488.38 : x
  2. Step 2: Convert to fraction form
    386,841.66/580,427.61 = 218,488.38/x
  3. Step 3: Cross multiply
    386,841.66x = 580,427.61 × 218,488.38
  4. Step 4: Simplify right side
    386,841.66x = 126,816,688,216.17
  5. Step 5: Solve for x
    x = 126,816,688,216.17/386,841.66
  6. Step 6: Final answer
    x = 327,825.83

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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.