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Finding the Fourth Proportional to 328,422.40, 492,050.40 and 307,427.20

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Solution

The fourth proportional to 328,422.40, 492,050.40 and 307,427.20 is: 460,594.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,422.40 : 492,050.40 = 307,427.20 : x
  2. Step 2: Convert to fraction form
    328,422.40/492,050.40 = 307,427.20/x
  3. Step 3: Cross multiply
    328,422.40x = 492,050.40 × 307,427.20
  4. Step 4: Simplify right side
    328,422.40x = 151,269,676,730.88
  5. Step 5: Solve for x
    x = 151,269,676,730.88/328,422.40
  6. Step 6: Final answer
    x = 460,594.88

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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.