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Finding the Fourth Proportional to 485,315.08, 728,071.02 and 185,805.40

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Solution

The fourth proportional to 485,315.08, 728,071.02 and 185,805.40 is: 278,745.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,315.08 : 728,071.02 = 185,805.40 : x
  2. Step 2: Convert to fraction form
    485,315.08/728,071.02 = 185,805.40/x
  3. Step 3: Cross multiply
    485,315.08x = 728,071.02 × 185,805.40
  4. Step 4: Simplify right side
    485,315.08x = 135,279,527,099.51
  5. Step 5: Solve for x
    x = 135,279,527,099.51/485,315.08
  6. Step 6: Final answer
    x = 278,745.77

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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.