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Finding the Fourth Proportional to 328,475.40, 492,713.10 and 91,817.70

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Solution

The fourth proportional to 328,475.40, 492,713.10 and 91,817.70 is: 137,726.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,475.40 : 492,713.10 = 91,817.70 : x
  2. Step 2: Convert to fraction form
    328,475.40/492,713.10 = 91,817.70/x
  3. Step 3: Cross multiply
    328,475.40x = 492,713.10 × 91,817.70
  4. Step 4: Simplify right side
    328,475.40x = 45,239,783,601.87
  5. Step 5: Solve for x
    x = 45,239,783,601.87/328,475.40
  6. Step 6: Final answer
    x = 137,726.55

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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.