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Finding the Fourth Proportional to 400,863.80, 553,170.66 and 219,566.36

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Solution

The fourth proportional to 400,863.80, 553,170.66 and 219,566.36 is: 302,989.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,863.80 : 553,170.66 = 219,566.36 : x
  2. Step 2: Convert to fraction form
    400,863.80/553,170.66 = 219,566.36/x
  3. Step 3: Cross multiply
    400,863.80x = 553,170.66 × 219,566.36
  4. Step 4: Simplify right side
    400,863.80x = 121,457,668,275.00
  5. Step 5: Solve for x
    x = 121,457,668,275.00/400,863.80
  6. Step 6: Final answer
    x = 302,989.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.