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Finding the Fourth Proportional to 485,810.36, 728,808.93 and 186,267.57

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Solution

The fourth proportional to 485,810.36, 728,808.93 and 186,267.57 is: 279,437.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,810.36 : 728,808.93 = 186,267.57 : x
  2. Step 2: Convert to fraction form
    485,810.36/728,808.93 = 186,267.57/x
  3. Step 3: Cross multiply
    485,810.36x = 728,808.93 × 186,267.57
  4. Step 4: Simplify right side
    485,810.36x = 135,753,468,385.40
  5. Step 5: Solve for x
    x = 135,753,468,385.40/485,810.36
  6. Step 6: Final answer
    x = 279,437.17

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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.