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Finding the Fourth Proportional to 262,147.20, 393,220.80 and 112,459.20

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Solution

The fourth proportional to 262,147.20, 393,220.80 and 112,459.20 is: 168,688.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,147.20 : 393,220.80 = 112,459.20 : x
  2. Step 2: Convert to fraction form
    262,147.20/393,220.80 = 112,459.20/x
  3. Step 3: Cross multiply
    262,147.20x = 393,220.80 × 112,459.20
  4. Step 4: Simplify right side
    262,147.20x = 44,221,296,591.36
  5. Step 5: Solve for x
    x = 44,221,296,591.36/262,147.20
  6. Step 6: Final answer
    x = 168,688.80

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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.