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Finding the Fourth Proportional to 485,319.08, 728,077.02 and 185,809.40

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Solution

The fourth proportional to 485,319.08, 728,077.02 and 185,809.40 is: 278,751.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,319.08 : 728,077.02 = 185,809.40 : x
  2. Step 2: Convert to fraction form
    485,319.08/728,077.02 = 185,809.40/x
  3. Step 3: Cross multiply
    485,319.08x = 728,077.02 × 185,809.40
  4. Step 4: Simplify right side
    485,319.08x = 135,283,554,239.99
  5. Step 5: Solve for x
    x = 135,283,554,239.99/485,319.08
  6. Step 6: Final answer
    x = 278,751.77

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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.