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Finding the Fourth Proportional to 545,398.74, 818,153.97 and 208,722.60

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Solution

The fourth proportional to 545,398.74, 818,153.97 and 208,722.60 is: 313,105.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,398.74 : 818,153.97 = 208,722.60 : x
  2. Step 2: Convert to fraction form
    545,398.74/818,153.97 = 208,722.60/x
  3. Step 3: Cross multiply
    545,398.74x = 818,153.97 × 208,722.60
  4. Step 4: Simplify right side
    545,398.74x = 170,767,223,818.72
  5. Step 5: Solve for x
    x = 170,767,223,818.72/545,398.74
  6. Step 6: Final answer
    x = 313,105.28

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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.