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Finding the Fourth Proportional to 485,710.51, 728,727.11 and 215,801.10

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Solution

The fourth proportional to 485,710.51, 728,727.11 and 215,801.10 is: 323,773.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,710.51 : 728,727.11 = 215,801.10 : x
  2. Step 2: Convert to fraction form
    485,710.51/728,727.11 = 215,801.10/x
  3. Step 3: Cross multiply
    485,710.51x = 728,727.11 × 215,801.10
  4. Step 4: Simplify right side
    485,710.51x = 157,260,111,937.82
  5. Step 5: Solve for x
    x = 157,260,111,937.82/485,710.51
  6. Step 6: Final answer
    x = 323,773.34

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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.