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Finding the Fourth Proportional to 545,395.75, 818,149.48 and 208,719.59

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Solution

The fourth proportional to 545,395.75, 818,149.48 and 208,719.59 is: 313,100.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,395.75 : 818,149.48 = 208,719.59 : x
  2. Step 2: Convert to fraction form
    545,395.75/818,149.48 = 208,719.59/x
  3. Step 3: Cross multiply
    545,395.75x = 818,149.48 × 208,719.59
  4. Step 4: Simplify right side
    545,395.75x = 170,763,819,411.77
  5. Step 5: Solve for x
    x = 170,763,819,411.77/545,395.75
  6. Step 6: Final answer
    x = 313,100.75

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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.