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Finding the Fourth Proportional to 338,756.80, 507,811.20 and 125,467.60

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Solution

The fourth proportional to 338,756.80, 507,811.20 and 125,467.60 is: 188,081.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,756.80 : 507,811.20 = 125,467.60 : x
  2. Step 2: Convert to fraction form
    338,756.80/507,811.20 = 125,467.60/x
  3. Step 3: Cross multiply
    338,756.80x = 507,811.20 × 125,467.60
  4. Step 4: Simplify right side
    338,756.80x = 63,713,852,517.12
  5. Step 5: Solve for x
    x = 63,713,852,517.12/338,756.80
  6. Step 6: Final answer
    x = 188,081.40

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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.