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Finding the Fourth Proportional to 259,289.60, 388,934.40 and 72,300.80

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Solution

The fourth proportional to 259,289.60, 388,934.40 and 72,300.80 is: 108,451.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,289.60 : 388,934.40 = 72,300.80 : x
  2. Step 2: Convert to fraction form
    259,289.60/388,934.40 = 72,300.80/x
  3. Step 3: Cross multiply
    259,289.60x = 388,934.40 × 72,300.80
  4. Step 4: Simplify right side
    259,289.60x = 28,120,268,267.52
  5. Step 5: Solve for x
    x = 28,120,268,267.52/259,289.60
  6. Step 6: Final answer
    x = 108,451.20

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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.