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Finding the Fourth Proportional to 328,475.70, 492,728.13 and 128,778.30

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Solution

The fourth proportional to 328,475.70, 492,728.13 and 128,778.30 is: 193,173.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,475.70 : 492,728.13 = 128,778.30 : x
  2. Step 2: Convert to fraction form
    328,475.70/492,728.13 = 128,778.30/x
  3. Step 3: Cross multiply
    328,475.70x = 492,728.13 × 128,778.30
  4. Step 4: Simplify right side
    328,475.70x = 63,452,690,943.58
  5. Step 5: Solve for x
    x = 63,452,690,943.58/328,475.70
  6. Step 6: Final answer
    x = 193,173.17

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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.