Home / 328,631.80-492,583.20-128,885.80

Finding the Fourth Proportional to 328,631.80, 492,583.20 and 128,885.80

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Solution

The fourth proportional to 328,631.80, 492,583.20 and 128,885.80 is: 193,185.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,631.80 : 492,583.20 = 128,885.80 : x
  2. Step 2: Convert to fraction form
    328,631.80/492,583.20 = 128,885.80/x
  3. Step 3: Cross multiply
    328,631.80x = 492,583.20 × 128,885.80
  4. Step 4: Simplify right side
    328,631.80x = 63,486,979,798.56
  5. Step 5: Solve for x
    x = 63,486,979,798.56/328,631.80
  6. Step 6: Final answer
    x = 193,185.75

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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.