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Finding the Fourth Proportional to 291,703.40, 437,900.70 and 289,629.80

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Solution

The fourth proportional to 291,703.40, 437,900.70 and 289,629.80 is: 434,787.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,703.40 : 437,900.70 = 289,629.80 : x
  2. Step 2: Convert to fraction form
    291,703.40/437,900.70 = 289,629.80/x
  3. Step 3: Cross multiply
    291,703.40x = 437,900.70 × 289,629.80
  4. Step 4: Simplify right side
    291,703.40x = 126,829,092,160.86
  5. Step 5: Solve for x
    x = 126,829,092,160.86/291,703.40
  6. Step 6: Final answer
    x = 434,787.84

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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.