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Finding the Fourth Proportional to 247,285.80, 370,928.70 and 208,405.80

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Solution

The fourth proportional to 247,285.80, 370,928.70 and 208,405.80 is: 312,608.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,285.80 : 370,928.70 = 208,405.80 : x
  2. Step 2: Convert to fraction form
    247,285.80/370,928.70 = 208,405.80/x
  3. Step 3: Cross multiply
    247,285.80x = 370,928.70 × 208,405.80
  4. Step 4: Simplify right side
    247,285.80x = 77,303,692,466.46
  5. Step 5: Solve for x
    x = 77,303,692,466.46/247,285.80
  6. Step 6: Final answer
    x = 312,608.70

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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.