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Finding the Fourth Proportional to 318,612.60, 478,178.10 and 308,244.60

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Solution

The fourth proportional to 318,612.60, 478,178.10 and 308,244.60 is: 462,617.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,612.60 : 478,178.10 = 308,244.60 : x
  2. Step 2: Convert to fraction form
    318,612.60/478,178.10 = 308,244.60/x
  3. Step 3: Cross multiply
    318,612.60x = 478,178.10 × 308,244.60
  4. Step 4: Simplify right side
    318,612.60x = 147,395,817,163.26
  5. Step 5: Solve for x
    x = 147,395,817,163.26/318,612.60
  6. Step 6: Final answer
    x = 462,617.67

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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.