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Finding the Fourth Proportional to 328,445.40, 492,084.90 and 307,450.20

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Solution

The fourth proportional to 328,445.40, 492,084.90 and 307,450.20 is: 460,629.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,445.40 : 492,084.90 = 307,450.20 : x
  2. Step 2: Convert to fraction form
    328,445.40/492,084.90 = 307,450.20/x
  3. Step 3: Cross multiply
    328,445.40x = 492,084.90 × 307,450.20
  4. Step 4: Simplify right side
    328,445.40x = 151,291,600,921.98
  5. Step 5: Solve for x
    x = 151,291,600,921.98/328,445.40
  6. Step 6: Final answer
    x = 460,629.38

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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.