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Finding the Fourth Proportional to 328,471.70, 492,722.13 and 128,774.30

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Solution

The fourth proportional to 328,471.70, 492,722.13 and 128,774.30 is: 193,167.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,471.70 : 492,722.13 = 128,774.30 : x
  2. Step 2: Convert to fraction form
    328,471.70/492,722.13 = 128,774.30/x
  3. Step 3: Cross multiply
    328,471.70x = 492,722.13 × 128,774.30
  4. Step 4: Simplify right side
    328,471.70x = 63,449,947,385.26
  5. Step 5: Solve for x
    x = 63,449,947,385.26/328,471.70
  6. Step 6: Final answer
    x = 193,167.17

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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.