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Finding the Fourth Proportional to 485,666.30, 728,083.92 and 186,361.66

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Solution

The fourth proportional to 485,666.30, 728,083.92 and 186,361.66 is: 279,383.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,666.30 : 728,083.92 = 186,361.66 : x
  2. Step 2: Convert to fraction form
    485,666.30/728,083.92 = 186,361.66/x
  3. Step 3: Cross multiply
    485,666.30x = 728,083.92 × 186,361.66
  4. Step 4: Simplify right side
    485,666.30x = 135,686,927,950.51
  5. Step 5: Solve for x
    x = 135,686,927,950.51/485,666.30
  6. Step 6: Final answer
    x = 279,383.04

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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.