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Finding the Fourth Proportional to 509,516.60, 764,347.80 and 154,558.40

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Solution

The fourth proportional to 509,516.60, 764,347.80 and 154,558.40 is: 231,859.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,516.60 : 764,347.80 = 154,558.40 : x
  2. Step 2: Convert to fraction form
    509,516.60/764,347.80 = 154,558.40/x
  3. Step 3: Cross multiply
    509,516.60x = 764,347.80 × 154,558.40
  4. Step 4: Simplify right side
    509,516.60x = 118,136,373,011.52
  5. Step 5: Solve for x
    x = 118,136,373,011.52/509,516.60
  6. Step 6: Final answer
    x = 231,859.71

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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.