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Finding the Fourth Proportional to 328,464.70, 492,711.63 and 128,767.30

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Solution

The fourth proportional to 328,464.70, 492,711.63 and 128,767.30 is: 193,156.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,464.70 : 492,711.63 = 128,767.30 : x
  2. Step 2: Convert to fraction form
    328,464.70/492,711.63 = 128,767.30/x
  3. Step 3: Cross multiply
    328,464.70x = 492,711.63 × 128,767.30
  4. Step 4: Simplify right side
    328,464.70x = 63,445,146,273.70
  5. Step 5: Solve for x
    x = 63,445,146,273.70/328,464.70
  6. Step 6: Final answer
    x = 193,156.67

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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.