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Finding the Fourth Proportional to 386,840.73, 579,506.26 and 253,316.18

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Solution

The fourth proportional to 386,840.73, 579,506.26 and 253,316.18 is: 379,479.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,840.73 : 579,506.26 = 253,316.18 : x
  2. Step 2: Convert to fraction form
    386,840.73/579,506.26 = 253,316.18/x
  3. Step 3: Cross multiply
    386,840.73x = 579,506.26 × 253,316.18
  4. Step 4: Simplify right side
    386,840.73x = 146,798,308,538.47
  5. Step 5: Solve for x
    x = 146,798,308,538.47/386,840.73
  6. Step 6: Final answer
    x = 379,479.97

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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.