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Finding the Fourth Proportional to 485,870.05, 728,816.01 and 201,603.79

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Solution

The fourth proportional to 485,870.05, 728,816.01 and 201,603.79 is: 302,410.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,870.05 : 728,816.01 = 201,603.79 : x
  2. Step 2: Convert to fraction form
    485,870.05/728,816.01 = 201,603.79/x
  3. Step 3: Cross multiply
    485,870.05x = 728,816.01 × 201,603.79
  4. Step 4: Simplify right side
    485,870.05x = 146,932,069,828.68
  5. Step 5: Solve for x
    x = 146,932,069,828.68/485,870.05
  6. Step 6: Final answer
    x = 302,410.22

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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.