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Finding the Fourth Proportional to 485,336.40, 727,486.20 and 185,701.20

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Solution

The fourth proportional to 485,336.40, 727,486.20 and 185,701.20 is: 278,353.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,336.40 : 727,486.20 = 185,701.20 : x
  2. Step 2: Convert to fraction form
    485,336.40/727,486.20 = 185,701.20/x
  3. Step 3: Cross multiply
    485,336.40x = 727,486.20 × 185,701.20
  4. Step 4: Simplify right side
    485,336.40x = 135,095,060,323.44
  5. Step 5: Solve for x
    x = 135,095,060,323.44/485,336.40
  6. Step 6: Final answer
    x = 278,353.45

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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.