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Finding the Fourth Proportional to 320,421.20, 480,113.40 and 201,880.40

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Solution

The fourth proportional to 320,421.20, 480,113.40 and 201,880.40 is: 302,493.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,421.20 : 480,113.40 = 201,880.40 : x
  2. Step 2: Convert to fraction form
    320,421.20/480,113.40 = 201,880.40/x
  3. Step 3: Cross multiply
    320,421.20x = 480,113.40 × 201,880.40
  4. Step 4: Simplify right side
    320,421.20x = 96,925,485,237.36
  5. Step 5: Solve for x
    x = 96,925,485,237.36/320,421.20
  6. Step 6: Final answer
    x = 302,493.98

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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.