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Finding the Fourth Proportional to 328,235.98, 492,156.78 and 128,318.26

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Solution

The fourth proportional to 328,235.98, 492,156.78 and 128,318.26 is: 192,400.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,235.98 : 492,156.78 = 128,318.26 : x
  2. Step 2: Convert to fraction form
    328,235.98/492,156.78 = 128,318.26/x
  3. Step 3: Cross multiply
    328,235.98x = 492,156.78 × 128,318.26
  4. Step 4: Simplify right side
    328,235.98x = 63,152,701,656.80
  5. Step 5: Solve for x
    x = 63,152,701,656.80/328,235.98
  6. Step 6: Final answer
    x = 192,400.30

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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.