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Finding the Fourth Proportional to 264,886.20, 397,329.30 and 87,420.60

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Solution

The fourth proportional to 264,886.20, 397,329.30 and 87,420.60 is: 131,130.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    264,886.20 : 397,329.30 = 87,420.60 : x
  2. Step 2: Convert to fraction form
    264,886.20/397,329.30 = 87,420.60/x
  3. Step 3: Cross multiply
    264,886.20x = 397,329.30 × 87,420.60
  4. Step 4: Simplify right side
    264,886.20x = 34,734,765,803.58
  5. Step 5: Solve for x
    x = 34,734,765,803.58/264,886.20
  6. Step 6: Final answer
    x = 131,130.90

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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.