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Finding the Fourth Proportional to 485,111.80, 726,890.10 and 307,300.60

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Solution

The fourth proportional to 485,111.80, 726,890.10 and 307,300.60 is: 460,458.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,111.80 : 726,890.10 = 307,300.60 : x
  2. Step 2: Convert to fraction form
    485,111.80/726,890.10 = 307,300.60/x
  3. Step 3: Cross multiply
    485,111.80x = 726,890.10 × 307,300.60
  4. Step 4: Simplify right side
    485,111.80x = 223,373,763,864.06
  5. Step 5: Solve for x
    x = 223,373,763,864.06/485,111.80
  6. Step 6: Final answer
    x = 460,458.32

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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.