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Finding the Fourth Proportional to 545,410.65, 818,171.96 and 208,734.51

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Solution

The fourth proportional to 545,410.65, 818,171.96 and 208,734.51 is: 313,123.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,410.65 : 818,171.96 = 208,734.51 : x
  2. Step 2: Convert to fraction form
    545,410.65/818,171.96 = 208,734.51/x
  3. Step 3: Cross multiply
    545,410.65x = 818,171.96 × 208,734.51
  4. Step 4: Simplify right side
    545,410.65x = 170,780,725,211.77
  5. Step 5: Solve for x
    x = 170,780,725,211.77/545,410.65
  6. Step 6: Final answer
    x = 313,123.19

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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.