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Finding the Fourth Proportional to 320,871.60, 481,307.40 and 163,407.60

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Solution

The fourth proportional to 320,871.60, 481,307.40 and 163,407.60 is: 245,111.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,871.60 : 481,307.40 = 163,407.60 : x
  2. Step 2: Convert to fraction form
    320,871.60/481,307.40 = 163,407.60/x
  3. Step 3: Cross multiply
    320,871.60x = 481,307.40 × 163,407.60
  4. Step 4: Simplify right side
    320,871.60x = 78,649,287,096.24
  5. Step 5: Solve for x
    x = 78,649,287,096.24/320,871.60
  6. Step 6: Final answer
    x = 245,111.40

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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.