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Finding the Fourth Proportional to 339,737.60, 509,606.40 and 318,742.40

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Solution

The fourth proportional to 339,737.60, 509,606.40 and 318,742.40 is: 478,113.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,737.60 : 509,606.40 = 318,742.40 : x
  2. Step 2: Convert to fraction form
    339,737.60/509,606.40 = 318,742.40/x
  3. Step 3: Cross multiply
    339,737.60x = 509,606.40 × 318,742.40
  4. Step 4: Simplify right side
    339,737.60x = 162,433,166,991.36
  5. Step 5: Solve for x
    x = 162,433,166,991.36/339,737.60
  6. Step 6: Final answer
    x = 478,113.60

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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.