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Finding the Fourth Proportional to 499,311.72, 689,410.98 and 308,586.60

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Solution

The fourth proportional to 499,311.72, 689,410.98 and 308,586.60 is: 426,072.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,311.72 : 689,410.98 = 308,586.60 : x
  2. Step 2: Convert to fraction form
    499,311.72/689,410.98 = 308,586.60/x
  3. Step 3: Cross multiply
    499,311.72x = 689,410.98 × 308,586.60
  4. Step 4: Simplify right side
    499,311.72x = 212,742,990,320.87
  5. Step 5: Solve for x
    x = 212,742,990,320.87/499,311.72
  6. Step 6: Final answer
    x = 426,072.49

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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.