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Finding the Fourth Proportional to 486,036.90, 728,836.65 and 186,417.90

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Solution

The fourth proportional to 486,036.90, 728,836.65 and 186,417.90 is: 279,542.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,036.90 : 728,836.65 = 186,417.90 : x
  2. Step 2: Convert to fraction form
    486,036.90/728,836.65 = 186,417.90/x
  3. Step 3: Cross multiply
    486,036.90x = 728,836.65 × 186,417.90
  4. Step 4: Simplify right side
    486,036.90x = 135,868,197,736.04
  5. Step 5: Solve for x
    x = 135,868,197,736.04/486,036.90
  6. Step 6: Final answer
    x = 279,542.97

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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.