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Finding the Fourth Proportional to 515,485.80, 773,228.70 and 136,405.80

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Solution

The fourth proportional to 515,485.80, 773,228.70 and 136,405.80 is: 204,608.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,485.80 : 773,228.70 = 136,405.80 : x
  2. Step 2: Convert to fraction form
    515,485.80/773,228.70 = 136,405.80/x
  3. Step 3: Cross multiply
    515,485.80x = 773,228.70 × 136,405.80
  4. Step 4: Simplify right side
    515,485.80x = 105,472,879,406.46
  5. Step 5: Solve for x
    x = 105,472,879,406.46/515,485.80
  6. Step 6: Final answer
    x = 204,608.70

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Similar ratio
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1.5x scale

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.