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Finding the Fourth Proportional to 289,489.32, 399,380.32 and 180,529.56

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Solution

The fourth proportional to 289,489.32, 399,380.32 and 180,529.56 is: 249,059.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,489.32 : 399,380.32 = 180,529.56 : x
  2. Step 2: Convert to fraction form
    289,489.32/399,380.32 = 180,529.56/x
  3. Step 3: Cross multiply
    289,489.32x = 399,380.32 × 180,529.56
  4. Step 4: Simplify right side
    289,489.32x = 72,099,953,442.26
  5. Step 5: Solve for x
    x = 72,099,953,442.26/289,489.32
  6. Step 6: Final answer
    x = 249,059.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.