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Finding the Fourth Proportional to 260,970.60, 391,455.90 and 73,983.72

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Solution

The fourth proportional to 260,970.60, 391,455.90 and 73,983.72 is: 110,975.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,970.60 : 391,455.90 = 73,983.72 : x
  2. Step 2: Convert to fraction form
    260,970.60/391,455.90 = 73,983.72/x
  3. Step 3: Cross multiply
    260,970.60x = 391,455.90 × 73,983.72
  4. Step 4: Simplify right side
    260,970.60x = 28,961,363,697.95
  5. Step 5: Solve for x
    x = 28,961,363,697.95/260,970.60
  6. Step 6: Final answer
    x = 110,975.58

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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.