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Finding the Fourth Proportional to 386,476.40, 579,714.60 and 186,892.40

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Solution

The fourth proportional to 386,476.40, 579,714.60 and 186,892.40 is: 280,338.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,476.40 : 579,714.60 = 186,892.40 : x
  2. Step 2: Convert to fraction form
    386,476.40/579,714.60 = 186,892.40/x
  3. Step 3: Cross multiply
    386,476.40x = 579,714.60 × 186,892.40
  4. Step 4: Simplify right side
    386,476.40x = 108,344,252,909.04
  5. Step 5: Solve for x
    x = 108,344,252,909.04/386,476.40
  6. Step 6: Final answer
    x = 280,338.60

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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.