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Finding the Fourth Proportional to 400,790.63, 553,091.05 and 219,502.98

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Solution

The fourth proportional to 400,790.63, 553,091.05 and 219,502.98 is: 302,914.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,790.63 : 553,091.05 = 219,502.98 : x
  2. Step 2: Convert to fraction form
    400,790.63/553,091.05 = 219,502.98/x
  3. Step 3: Cross multiply
    400,790.63x = 553,091.05 × 219,502.98
  4. Step 4: Simplify right side
    400,790.63x = 121,405,133,686.33
  5. Step 5: Solve for x
    x = 121,405,133,686.33/400,790.63
  6. Step 6: Final answer
    x = 302,914.10

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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.