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Finding the Fourth Proportional to 260,343.20, 389,607.60 and 155,237.60

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Solution

The fourth proportional to 260,343.20, 389,607.60 and 155,237.60 is: 232,315.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,343.20 : 389,607.60 = 155,237.60 : x
  2. Step 2: Convert to fraction form
    260,343.20/389,607.60 = 155,237.60/x
  3. Step 3: Cross multiply
    260,343.20x = 389,607.60 × 155,237.60
  4. Step 4: Simplify right side
    260,343.20x = 60,481,748,765.76
  5. Step 5: Solve for x
    x = 60,481,748,765.76/260,343.20
  6. Step 6: Final answer
    x = 232,315.45

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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.