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Finding the Fourth Proportional to 328,681.50, 492,690.09 and 128,923.65

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Solution

The fourth proportional to 328,681.50, 492,690.09 and 128,923.65 is: 193,255.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,681.50 : 492,690.09 = 128,923.65 : x
  2. Step 2: Convert to fraction form
    328,681.50/492,690.09 = 128,923.65/x
  3. Step 3: Cross multiply
    328,681.50x = 492,690.09 × 128,923.65
  4. Step 4: Simplify right side
    328,681.50x = 63,519,405,205.09
  5. Step 5: Solve for x
    x = 63,519,405,205.09/328,681.50
  6. Step 6: Final answer
    x = 193,255.19

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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.