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Finding the Fourth Proportional to 289,432.80, 434,127.60 and 120,909.60

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Solution

The fourth proportional to 289,432.80, 434,127.60 and 120,909.60 is: 181,355.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,432.80 : 434,127.60 = 120,909.60 : x
  2. Step 2: Convert to fraction form
    289,432.80/434,127.60 = 120,909.60/x
  3. Step 3: Cross multiply
    289,432.80x = 434,127.60 × 120,909.60
  4. Step 4: Simplify right side
    289,432.80x = 52,490,194,464.96
  5. Step 5: Solve for x
    x = 52,490,194,464.96/289,432.80
  6. Step 6: Final answer
    x = 181,355.38

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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.