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Finding the Fourth Proportional to 485,426.08, 728,139.36 and 153,028

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Solution

The fourth proportional to 485,426.08, 728,139.36 and 153,028 is: 229,542.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,426.08 : 728,139.36 = 153,028 : x
  2. Step 2: Convert to fraction form
    485,426.08/728,139.36 = 153,028/x
  3. Step 3: Cross multiply
    485,426.08x = 728,139.36 × 153,028
  4. Step 4: Simplify right side
    485,426.08x = 111,425,709,982.08
  5. Step 5: Solve for x
    x = 111,425,709,982.08/485,426.08
  6. Step 6: Final answer
    x = 229,542.08

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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.